<PAGE>

As filed with the Securities and Exchange Commission on November 4, 1999,
Registration No. _____________

===============================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                          ---------------------------

                                   FORM S-8
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                          ---------------------------

                               ZIXIT CORPORATION
            (Exact name of registrant as specified in its charter)


           Texas                                         75-2216818
(State or other jurisdiction                            (IRS Employer
of incorporation or organization)                     Identification No.)


                                                        Steve M. York
                                                     One Galleria Tower
    One Galleria Tower                          13355 Noel Road, Suite 1555
13355 Noel Road, Suite 1555                      Dallas, Texas  75240-6604
 Dallas, Texas 75240-6604                              (972) 702-7055


(Address, including zip code,               (Name, address, including zip code,
of principal executive offices)            and telephone number, including area
                                                code, of agent for service)


              ZIXIT CORPORATION 1999 DIRECTORS' STOCK OPTION PLAN

                           (Full title of the plan)

                      -----------------------------------

                        Calculation of Registration Fee

<TABLE>
<CAPTION>

====================================================================================================
                                                           Proposed     Proposed
                                                           maximum      maximum
                                             Amount        offering     aggregate      Amount of
         Title of securities                 to be         price per    offering      registration
           to be registered              registered (1)    share (2)    price (2)       fee (2)
----------------------------------------------------------------------------------------------------
<S>                                    <C>                 <C>        <C>              <C>
Common Stock, $.01 par value            750,000  Shares     $36.06     $23,210,022       $6,452
====================================================================================================
</TABLE>

(1)  Securities being registered consist of 750,000 shares issuable upon
     exercise of options under the ZixIt Corporation 1999 Directors' Stock
     Option Plan (the "1999 Plan") as of November 4, 1999, and, pursuant to Rule
     416 of the Securities Act of 1933, as amended (the "Securities Act"), any
     additional shares of Common Stock that may be issuable pursuant to the
     anti-dilution provisions of the 1999 Plan.

(2)  Estimated solely for the purpose of calculating the registration fee.  The
     registration fee has been calculated in accordance with Rules 457(c) and
     457(h) under the Securities Act on the basis of, (a) in the case of 150,924
     shares registered with respect to options outstanding under the 1999 Plan
     with an aggregate exercise price of $1,607,341, the price at which the
     options may be exercised, which is $10.65 per share; and (b) in the case of
     599,076 shares registered with respect to shares that remain available for
     grant under the 1999 Plan on the date of filing this Registration
     Statement, the average of the high and low prices of the Common Stock as
     quoted on the NASDAQ National Market System on October 28, 1999, which was
     $36.06.
<PAGE>

                                    PART II

              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


Item 3. Incorporation of Certain Documents by Reference.

        The following documents are hereby incorporated herein by reference:

        (a)   The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 1998, which contains audited financial statements of the
Registrant for the Registrant's last completed fiscal year.

        (b)   The Registrant's Quarterly Reports on Form 10-Q for the quarters
ended March 31, 1999 and June 30, 1999.

        (c)   A description of the Registrant's Common Stock contained in the
Registrant's Registration Statement on Form 8-A, filed with the Commission on
September 25, 1989, including any amendment or report filed for the purpose of
updating such description.

        (d)   All reports filed by the Registrant pursuant to Section 13(a) or
15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
since the end of the fiscal year covered by the Annual Report referred to in (a)
above.

        All reports or other documents subsequently filed by the Registrant
pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to
the filing of a post-effective amendment which indicates that all securities
offered have been sold or which de-registers all securities then remaining
unsold, shall be deemed to be incorporated by reference in this Registration
Statement and to be a part hereof from the date of filing of such reports and
documents.

        Any statement contained herein or in a document incorporated or deemed
to be incorporated herein by reference shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated herein by reference modifies or
supersedes such earlier statement. Any statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Registration Statement.

Item 4. Description of Securities.

        Not applicable.

Item 5. Interests of Named Experts and Counsel.

        Not applicable.

Item 6. Indemnification of Directors and Officers.

        As permitted by the Texas Business Corporation Act, the Registrant's
Articles of Incorporation provide that directors of the Registrant shall not be
personally liable to the Registrant or its shareholders for monetary damages for
breach of fiduciary duty as a director, except for liability for (i) any breach
of the director's duty of loyalty to the Registrant or its shareholders, (ii)
any act or omission not in good faith or which involves intentional misconduct
or a knowing violation of law, (iii) any transaction from which the director
derived any improper personal benefit, (iv) any act or omission where the
liability of the director is expressly provided by statute, or (v) any act
related to an unlawful stock repurchase or payment of a dividend.  In addition,
the Registrant's Articles of Incorporation and Bylaws include certain provisions
permitted by the Texas Business Corporation Act whereby directors, officers,
employees, and agents of the Registrant generally are to be indemnified against
certain liabilities to the fullest extent authorized by the Texas Business
Corporation Act.

                                       2
<PAGE>

Item 7. Exemption from Registration Claimed.

        Not applicable.

Item 8. Exhibits.

        5.1   Opinion of Hughes & Luce, L.L.P. as to the validity of the
securities being registered.

        23.1  Consent of Hughes & Luce, L.L.P. (included in its opinion filed as
Exhibit 5.1).

        23.2  Consent of Ernst & Young LLP.

        24.1  Power of Attorney (included in Part II of this Registration
Statement).

Item 9. Undertakings.

        (a)   The undersigned Registrant hereby undertakes:

              (1)   To file, during any period in which offers or sales are
        being made, a post-effective amendment to this Registration Statement:

                    (i)   To include any Prospectus required by Section 10(a)(3)
              of the Securities Act;

                    (ii)  To reflect in the Prospectus any facts or events
              arising after the effective date of the Registration Statement (or
              the most recent post-effective amendment thereof) which,
              individually or in the aggregate, represent a fundamental change
              in the information set forth in the Registration Statement;

                    (iii) To include any material information with respect to
              the plan of distribution not previously disclosed in the
              Registration Statement or any material change to such information
              in the Registration Statement;

        provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) shall not
        apply if the information required to be included in a post-effective
        amendment by those paragraphs is contained in periodic reports filed by
        the Registrant pursuant to Section 13 or Section 15(d) of the Exchange
        Act that are incorporated by reference in the Registration Statement.

              (2)   That, for the purpose of determining any liability under the
        Securities Act, each such post-effective amendment shall be deemed to be
        a new registration statement relating to the securities offered therein,
        and the offering of such securities at that time shall be deemed to be
        the initial bona fide offering thereof.

              (3)   To remove from registration by means of a post-effective
        amendment any of the securities being registered that remain unsold at
        the termination of the offering.

        (b)   The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's Annual Report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the Registration Statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the provisions described in Item 6 or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission, such indemnification is against public policy as expressed
in the Securities Act and is, therefore, unenforceable. In the

                                       3
<PAGE>

event that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

                                  SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas on November 4, 1999.


                                   ZIXIT CORPORATION



                                   By:  /s/ Steve M. York
                                        --------------------------------------
                                        Steve M. York
                                        Senior Vice President, Chief Financial
                                        Officer and Treasurer

                                       4
<PAGE>

                               POWER OF ATTORNEY

        Each of the undersigned hereby appoints David P. Cook and Steve M. York,
and each of them acting individually, as his true and lawful attorneys-in-fact
and agents, with full power of substitution, for and in the name, place and
stead of the undersigned, in any and all capacities to sign and file with the
Securities and Exchange Commission under the Securities Act of 1933, any and all
amendments and exhibits to this Registration Statement and any and all
applications, instruments and other documents to be filed with the Securities
and Exchange Commission pertaining to the registration of the securities covered
hereby or the transactions contemplated herein.

        Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

     Signature                       Title                          Date
     ---------                       -----                          ----


/s/ DAVID P. COOK            President and Chief               October 29, 1999
---------------------------  Executive Officer and
(David P. Cook)              Director (Principal Executive
                             Officer)



/s/ STEVE M. YORK            Senior Vice President,            October 29, 1999
---------------------------  Chief Financial Officer,
(Steve M. York)              and Treasurer (Principal
                             Financial and Accounting
                             Officer)



/s/ MICHAEL E. KEANE         Director                          October 29, 1999
---------------------------
(Michael E. Keane)


/s/ JAMES S. MARSTON         Director                          October 29, 1999
---------------------------
(James S. Marston)


/s/ JACK L. MARTIN           Director                          October 29, 1999
---------------------------
(Jack L. Martin)


/s/ ANTONIO R. SANCHEZ, JR.  Director                          October 29, 1999
---------------------------
(Antonio R. Sanchez, Jr.)


/s/ DR. BEN G. STREETMAN     Director                          October 29, 1999
---------------------------
(Dr. Ben G. Streetman)


/s/ MARK A. TEBBE            Director                          October 29, 1999
---------------------------
(Mark A. Tebbe)

                                       5
<PAGE>

                               INDEX TO EXHIBITS



Exhibit
Number    Description
------    -----------

5.1*      Opinion of Hughes & Luce, L.L.P. as to the validity of the securities
          being registered.

23.1      Consent of Hughes & Luce, L.L.P. (included in its opinion filed as
          Exhibit 5.1).

23.2*     Consent of Ernst & Young LLP.

24.1      Power of Attorney (included in Part II of this Registration
          Statement).

------------------------------
*Filed electronically herewith.

                                       6
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 15437}]
{"company-data": {"conformed-name": "ZIXIT CORP", "cik": "0000855612", "assigned-sic": "7370", "irs-number": "752216818", "state-of-incorporation": "TX", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-90323", "film-number": "99741210"}, "business-address": {"street1": "ONE GALLERIA TOWER", "street2": "13355 NOEL RD  STE 1555", "city": "DALLAS", "state": "TX", "zip": "75240-6604", "phone": "9727027055"}, "mail-address": {"street1": "ONE GALLERIA TOWER", "street2": "13355 NOEL RD  STE 1555", "city": "DALLAS", "state": "TX", "zip": "75240-6604"}, "former-company": [{"former-conformed-name": "CUSTOMTRACKS CORP /TX/", "date-changed": "19980904"}, {"former-conformed-name": "AMTECH CORP", "date-changed": "19920703"}]}
As filed with the Securities and Exchange Commission on November 4, 1999,
Registration No. _____________

===============================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                          ---------------------------

                                   FORM S-8
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                          ---------------------------

                               ZIXIT CORPORATION
            (Exact name of registrant as specified in its charter)

           Texas                                         75-2216818
(State or other jurisdiction                            (IRS Employer
of incorporation or organization)                     Identification No.)

                                                        Steve M. York
                                                     One Galleria Tower
    One Galleria Tower                          13355 Noel Road, Suite 1555
13355 Noel Road, Suite 1555                      Dallas, Texas  75240-6604
 Dallas, Texas 75240-6604                              (972) 702-7055

(Address, including zip code,               (Name, address, including zip code,
of principal executive offices)            and telephone number, including area
                                                code, of agent for service)

              ZIXIT CORPORATION 1999 DIRECTORS' STOCK OPTION PLAN

                           (Full title of the plan)

                      -----------------------------------

                        Calculation of Registration Fee
====================================================================================================
                                                           Proposed     Proposed
                                                           maximum      maximum
                                             Amount        offering     aggregate      Amount of
         Title of securities                 to be         price per    offering      registration
           to be registered              registered (1)    share (2)    price (2)       fee (2)
----------------------------------------------------------------------------------------------------
Common Stock, $.01 par value            750,000  Shares     $36.06     $23,210,022       $6,452
====================================================================================================
(1)  Securities being registered consist of 750,000 shares issuable upon
     exercise of options under the ZixIt Corporation 1999 Directors' Stock
     Option Plan (the "1999 Plan") as of November 4, 1999, and, pursuant to Rule
     416 of the Securities Act of 1933, as amended (the "Securities Act"), any
     additional shares of Common Stock that may be issuable pursuant to the
     anti-dilution provisions of the 1999 Plan.

(2)  Estimated solely for the purpose of calculating the registration fee.  The
     registration fee has been calculated in accordance with Rules 457(c) and
     457(h) under the Securities Act on the basis of, (a) in the case of 150,924
     shares registered with respect to options outstanding under the 1999 Plan
     with an aggregate exercise price of $1,607,341, the price at which the
     options may be exercised, which is $10.65 per share; and (b) in the case of
     599,076 shares registered with respect to shares that remain available for
     grant under the 1999 Plan on the date of filing this Registration
     Statement, the average of the high and low prices of the Common Stock as
     quoted on the NASDAQ National Market System on October 28, 1999, which was
     $36.06.
PART II

              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Certain Documents by Reference.

        The following documents are hereby incorporated herein by reference:

        (a)   The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 1998, which contains audited financial statements of the
Registrant for the Registrant's last completed fiscal year.

        (b)   The Registrant's Quarterly Reports on Form 10-Q for the quarters
ended March 31, 1999 and June 30, 1999.

        (c)   A description of the Registrant's Common Stock contained in the
Registrant's Registration Statement on Form 8-A, filed with the Commission on
September 25, 1989, including any amendment or report filed for the purpose of
updating such description.

        (d)   All reports filed by the Registrant pursuant to Section 13(a) or
15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
since the end of the fiscal year covered by the Annual Report referred to in (a)
above.

        All reports or other documents subsequently filed by the Registrant
pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to
the filing of a post-effective amendment which indicates that all securities
offered have been sold or which de-registers all securities then remaining
unsold, shall be deemed to be incorporated by reference in this Registration
Statement and to be a part hereof from the date of filing of such reports and
documents.

        Any statement contained herein or in a document incorporated or deemed
to be incorporated herein by reference shall be deemed to be modified or
superseded for purposes of this Registration Statement to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated herein by reference modifies or
supersedes such earlier statement. Any statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Registration Statement.

Item 4. Description of Securities.

        Not applicable.

Item 5. Interests of Named Experts and Counsel.

        Not applicable.

Item 6. Indemnification of Directors and Officers.

        As permitted by the Texas Business Corporation Act, the Registrant's
Articles of Incorporation provide that directors of the Registrant shall not be
personally liable to the Registrant or its shareholders for monetary damages for
breach of fiduciary duty as a director, except for liability for (i) any breach
of the director's duty of loyalty to the Registrant or its shareholders, (ii)
any act or omission not in good faith or which involves intentional misconduct
or a knowing violation of law, (iii) any transaction from which the director
derived any improper personal benefit, (iv) any act or omission where the
liability of the director is expressly provided by statute, or (v) any act
related to an unlawful stock repurchase or payment of a dividend.  In addition,
the Registrant's Articles of Incorporation and Bylaws include certain provisions
permitted by the Texas Business Corporation Act whereby directors, officers,
employees, and agents of the Registrant generally are to be indemnified against
certain liabilities to the fullest extent authorized by the Texas Business
Corporation Act.

                                       2
Item 7. Exemption from Registration Claimed.

        Not applicable.

Item 8. Exhibits.

        5.1   Opinion of Hughes & Luce, L.L.P. as to the validity of the
securities being registered.

        23.1  Consent of Hughes & Luce, L.L.P. (included in its opinion filed as
Exhibit 5.1).

        23.2  Consent of Ernst & Young LLP.

        24.1  Power of Attorney (included in Part II of this Registration
Statement).

Item 9. Undertakings.

        (a)   The undersigned Registrant hereby undertakes:

              (1)   To file, during any period in which offers or sales are
        being made, a post-effective amendment to this Registration Statement:

                    (i)   To include any Prospectus required by Section 10(a)(3)
              of the Securities Act;

                    (ii)  To reflect in the Prospectus any facts or events
              arising after the effective date of the Registration Statement (or
              the most recent post-effective amendment thereof) which,
              individually or in the aggregate, represent a fundamental change
              in the information set forth in the Registration Statement;

                    (iii) To include any material information with respect to
              the plan of distribution not previously disclosed in the
              Registration Statement or any material change to such information
              in the Registration Statement;

        provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) shall not
        apply if the information required to be included in a post-effective
        amendment by those paragraphs is contained in periodic reports filed by
        the Registrant pursuant to Section 13 or Section 15(d) of the Exchange
        Act that are incorporated by reference in the Registration Statement.

              (2)   That, for the purpose of determining any liability under the
        Securities Act, each such post-effective amendment shall be deemed to be
        a new registration statement relating to the securities offered therein,
        and the offering of such securities at that time shall be deemed to be
        the initial bona fide offering thereof.

              (3)   To remove from registration by means of a post-effective
        amendment any of the securities being registered that remain unsold at
        the termination of the offering.

        (b)   The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's Annual Report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the Registration Statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the provisions described in Item 6 or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission, such indemnification is against public policy as expressed
in the Securities Act and is, therefore, unenforceable. In the

                                       3
event that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer or
controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered, the Registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.

                                  SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas on November 4, 1999.

                                   ZIXIT CORPORATION

                                   By:  /s/ Steve M. York
                                        --------------------------------------
                                        Steve M. York
                                        Senior Vice President, Chief Financial
                                        Officer and Treasurer

                                       4
POWER OF ATTORNEY

        Each of the undersigned hereby appoints David P. Cook and Steve M. York,
and each of them acting individually, as his true and lawful attorneys-in-fact
and agents, with full power of substitution, for and in the name, place and
stead of the undersigned, in any and all capacities to sign and file with the
Securities and Exchange Commission under the Securities Act of 1933, any and all
amendments and exhibits to this Registration Statement and any and all
applications, instruments and other documents to be filed with the Securities
and Exchange Commission pertaining to the registration of the securities covered
hereby or the transactions contemplated herein.

        Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

     Signature                       Title                          Date
     ---------                       -----                          ----

/s/ DAVID P. COOK            President and Chief               October 29, 1999
---------------------------  Executive Officer and
(David P. Cook)              Director (Principal Executive
                             Officer)

/s/ STEVE M. YORK            Senior Vice President,            October 29, 1999
---------------------------  Chief Financial Officer,
(Steve M. York)              and Treasurer (Principal
                             Financial and Accounting
                             Officer)

/s/ MICHAEL E. KEANE         Director                          October 29, 1999
---------------------------
(Michael E. Keane)

/s/ JAMES S. MARSTON         Director                          October 29, 1999
---------------------------
(James S. Marston)

/s/ JACK L. MARTIN           Director                          October 29, 1999
---------------------------
(Jack L. Martin)

/s/ ANTONIO R. SANCHEZ, JR.  Director                          October 29, 1999
---------------------------
(Antonio R. Sanchez, Jr.)

/s/ DR. BEN G. STREETMAN     Director                          October 29, 1999
---------------------------
(Dr. Ben G. Streetman)

/s/ MARK A. TEBBE            Director                          October 29, 1999
---------------------------
(Mark A. Tebbe)

                                       5
INDEX TO EXHIBITS

Exhibit
Number    Description
------    -----------

5.1*      Opinion of Hughes & Luce, L.L.P. as to the validity of the securities
          being registered.

23.1      Consent of Hughes & Luce, L.L.P. (included in its opinion filed as
          Exhibit 5.1).

23.2*     Consent of Ernst & Young LLP.

24.1      Power of Attorney (included in Part II of this Registration
          Statement).

------------------------------
*Filed electronically herewith.

                                       6