<PAGE>

     As filed with the Securities and Exchange Commission on March 14, 2000
                                                     File No. 333-______________
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

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

                         ADVANCED RADIO TELECOM CORP.
            (Exact name of registrant as specified in its charter)

          DELAWARE                                   52-1869023
  (State or other jurisdiction                      (I.R.S. Employer
 of incorporation or organization)                Identification No.)


                              500 108th Avenue NE
                                   Suite 2600
                          Bellevue, Washington  98004
                                 (425) 688-8700
          (Address of principal executive offices, including zip code)

                         RESTATED EQUITY INCENTIVE PLAN
                        -------------------------------
                            (Full title of the plan)

                             THOMAS M. WALKER, ESQ.
                                General Counsel
                          Advanced Radio Telecom Corp.
                              500 108th Avenue NE
                                   Suite 2600
                          Bellevue, Washington  98004
                                 (425) 688-8700
                              (425) 990-1642 (Fax)
-------------------------------------------------------------------------------
(Name, Address and Telephone Number, including Area Code, of Agent for Service)

                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
============================================================================================
 Title of Securities     Amount to be    Proposed maximum   Proposed maximum     Amount of
  to be registered        registered      offering price   aggregate offering  registration
                                          per share/(1)/       price/(2)/          fee
--------------------------------------------------------------------------------------------
<S>                    <C>                <C>                 <C>                  <C>
Common Stock,
par value $.001        4,000,000 shares   $10.063-$43.50      $154,547,830.25      $40,801
============================================================================================
</TABLE>

/(1)/  Pursuant to Rule 475(h) under the Securities Act of 1933, as amended, the
       offering price for shares subject to options on the date hereof is the
       actual exercise price of such options. Of the 4,000,000 shares to be
       registered hereunder, 3,000 shares are subject to options at an exercise
       price of $36.625 per share, 801,500 shares are subject to options at an
       exercise price of $32.391 per share, 7,500 shares are subject to options
       at an exercise price of $30.25 per share, 15,000 shares are subject to
       options at an exercise price of $14.00 per share, 300,000 shares are
       subject to options at an exercise price of $13.625 per share, 1,000
       shares are subject to options at an exercise price of $14.313 per share,
       1,500 shares are subject to options at an exercise price of $13.75 per
       share, 2,500 shares are subject to options at an exercise price of
       $10.063 per share, 3,000 shares are subject to options at an exercise
       price of $14.938 per share, 1,500 shares are subject to options at an
       exercise price of $12.125 per share, 1,750 shares are subject to options
       at an exercise price of $12.625 per share, 3,000 shares are subject to
       options at an exercise price of $13.063 per share, 10,000 shares are
       subject to options at an exercise price of $13.75 per share, 3,000 shares
       are subject to options at an exercise price of $13.438 per share, 1,500
       shares are subject to options at an exercise price of $11.75 per share
       and 5,000 shares are subject to options at an exercise price of $13.00
       per share. The offering price for the remaining 2,839,250 shares not
       subject to options on the date hereof of $43.50 per share has been
       estimated solely for the purposes of determining the registration fee
       pursuant to Rule 457(c) under the Securities Act of 1933, as amended, on
       the basis of the average of the high and low prices of Advanced Radio
       Telecom Corp. Common Stock, par value $0.001 per share, reported on the
       Nasdaq National Market on March 9, 2000.


/(2)/  The maximum aggregate offering price consists of $109,875 payable in
       respect of 3,000 shares subject to options at an exercise price of
       $32.625 per share, plus $25,961,386.50 payable in respect of 801,500
       shares subject to options at an exercise price of $32.391 per share, plus
       $226,875 payable in respect of 7,500 shares subject to options at an
       exercise price of $30.25 per share, plus $210,000 payable in respect of
       15,000 shares subject to options at an exercise price of $14.00 per
       share, plus $4,087,500 payable in respect of 300,000 shares subject to
       options at an exercise price of $13.625 per share, plus $14,313 payable
       in respect of 1,000 shares subject to options at an exercise price of
       $14.313 per share, plus $20,625 payable in respect of 1,500 shares
       subject to options at an exercise price of $13.75 per share, plus
       $25,157.50 payable in respect of 2,500 shares subject to options at an
       exercise price of $10.063 per share, plus $44,814 payable in respect of
       3,000 shares subject to options at an exercise price of $14.938 per
       share, plus $18,187.50 payable in respect of 1,500 shares subject to
       options at an exercise price of $12.125 per share, plus $22,093.75
       payable in respect of 1,750 shares subject to options at an exercise
       price of $12.625 per share, plus $39,189 payable in respect of 3,000
       shares are subject to options at an exercise price of $13.063 per share,
       plus $137,500 payable in respect of 10,000 shares subject to options at
       an exercise price of $13.75 per share, plus $40,314 payable in respect of
       3,000 shares subject to options at an exercise price of $13.438 per
       share, plus $17,625 payable in respect of 1,500 shares subject to options
       at an exercise price of $11.75 per share, plus $65,000 payable in respect
       of 5,000 shares subject to options at an exercise price of $13.00 per
       share, plus $123,507,375 payable in respect of 2,839,250 shares that have
       not yet been subject to options on the date hereof.

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

<PAGE>

                                EXPLANATORY NOTE


  This Registration Statement has been filed pursuant to General Instruction E
on Form S-8 to register 4,000,000 additional securities to be offered pursuant
to the Restated Equity Incentive Plan ("the Plan") of Advanced Radio Telecom
Corp. (the "Registrant" or the "Company").  A registration statement on Form S-8
(File No. 333-50155), filed with the Securities and Exchange Commission on April
15, 1998 to register 3,100,000 shares of Common Stock and Junior Preferred Stock
Purchase Rights issuable pursuant to the Plan and the 1997 Equity Incentive Plan
for Non-Employee Directors, is currently effective and is hereby incorporated
herein by reference.

                                      -2-
<PAGE>

                                   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 on Form S-8 to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Bellevue, State of Washington, on this 14th day
of March, 2000.

                                    ADVANCED RADIO TELECOM CORP.


                                    By: /s/ Robert S. McCambridge
                                        ---------------------------------
                                        Name:  Robert S. McCambridge
                                        Title: President


                               POWER OF ATTORNEY
                               -----------------

     Pursuant to the requirement of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.  Each person whose signature appears
below hereby authorizes and constitutes Robert S. McCambridge and Thomas M.
Walker, with full power of substitution, to execute in the name of and on behalf
of such person any amendment (including any post-effective amendment) to this
Registration Statement, and any subsequent registration statement for the same
offering that may be filed under Rule 462(b) under the Securities Act, and to
file the same, with exhibits thereto, and other documents in connection
therewith, making such changes in this Registration Statement and any subsequent
registration statement under Rule 462(b) as the person(s) so acting deems
appropriate.
<TABLE>
<CAPTION>

Signature                  Title                     Date
---------                  -----                     -----
<S>                        <C>                       <C>

/s/ Robert S. McCambridge
-------------------------  President, Acting Chief   March 14, 2000
Robert S. McCambridge      Executive Officer and
                           Chief Financial Officer


/s/ Bandel Carano
-------------------------  Director                  March 14, 2000
Bandel Carano

/s/ Andrew I. Fillat
-------------------------  Director                  March 14, 2000
Andrew I. Fillat

</TABLE>

                                      -3-
<PAGE>

<TABLE>
<S>                        <C>                       <C>

/s/ Richard T. Liebhaber
-------------------------  Director                  March 14, 2000
Richard T. Liebhaber


/s/ James B. Murray, Jr.
-------------------------  Director                  March 14, 2000
James B. Murray, Jr.


/s/ Alan Z. Senter
-------------------------  Director                  March 14, 2000
Alan Z. Senter


/s/ Marc B. Weisberg
-------------------------  Director                  March 14, 2000
Marc B. Weisberg

</TABLE>

                                      -4-
<PAGE>

                                 EXHIBIT INDEX
<TABLE>
<CAPTION>

Number  Title of Exhibit                              Page
------  --------------------------------------------  ----
<C>     <S>                                           <C>
  5     Opinion of Ropes & Gray                        6

  23.1  Consent of PricewaterhouseCoopers L.L.P.       7

  23.2  Consent of Ropes & Gray (contained in the
        opinion filed as Exhibit 5 hereto)             6

  24    Power of Attorney (included as part of the
        signature page filed herewith)                 3
</TABLE>

                                      -5-
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 11438}]
{"company-data": {"conformed-name": "ADVANCED RADIO TELECOM CORP", "cik": "0001010286", "assigned-sic": "4812", "irs-number": "521869023", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-32404", "film-number": "568872"}, "business-address": {"street1": "500 108TH AVE NE", "street2": "SUITE 2600", "city": "BELLEVUE", "state": "WA", "zip": "98004", "phone": "4256888700"}, "mail-address": {"street1": "500 108TH AVENUE NE", "street2": "SUITE 2600", "city": "BELLEVUE", "state": "WA", "zip": "98004"}}
As filed with the Securities and Exchange Commission on March 14, 2000
                                                     File No. 333-______________
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

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

                         ADVANCED RADIO TELECOM CORP.
            (Exact name of registrant as specified in its charter)

          DELAWARE                                   52-1869023
  (State or other jurisdiction                      (I.R.S. Employer
 of incorporation or organization)                Identification No.)

                              500 108th Avenue NE
                                   Suite 2600
                          Bellevue, Washington  98004
                                 (425) 688-8700
          (Address of principal executive offices, including zip code)

                         RESTATED EQUITY INCENTIVE PLAN
                        -------------------------------
                            (Full title of the plan)

                             THOMAS M. WALKER, ESQ.
                                General Counsel
                          Advanced Radio Telecom Corp.
                              500 108th Avenue NE
                                   Suite 2600
                          Bellevue, Washington  98004
                                 (425) 688-8700
                              (425) 990-1642 (Fax)
-------------------------------------------------------------------------------
(Name, Address and Telephone Number, including Area Code, of Agent for Service)

                        CALCULATION OF REGISTRATION FEE
============================================================================================
 Title of Securities     Amount to be    Proposed maximum   Proposed maximum     Amount of
  to be registered        registered      offering price   aggregate offering  registration
                                          per share/(1)/       price/(2)/          fee
--------------------------------------------------------------------------------------------
Common Stock,
par value $.001        4,000,000 shares   $10.063-$43.50      $154,547,830.25      $40,801
============================================================================================
/(1)/  Pursuant to Rule 475(h) under the Securities Act of 1933, as amended, the
       offering price for shares subject to options on the date hereof is the
       actual exercise price of such options. Of the 4,000,000 shares to be
       registered hereunder, 3,000 shares are subject to options at an exercise
       price of $36.625 per share, 801,500 shares are subject to options at an
       exercise price of $32.391 per share, 7,500 shares are subject to options
       at an exercise price of $30.25 per share, 15,000 shares are subject to
       options at an exercise price of $14.00 per share, 300,000 shares are
       subject to options at an exercise price of $13.625 per share, 1,000
       shares are subject to options at an exercise price of $14.313 per share,
       1,500 shares are subject to options at an exercise price of $13.75 per
       share, 2,500 shares are subject to options at an exercise price of
       $10.063 per share, 3,000 shares are subject to options at an exercise
       price of $14.938 per share, 1,500 shares are subject to options at an
       exercise price of $12.125 per share, 1,750 shares are subject to options
       at an exercise price of $12.625 per share, 3,000 shares are subject to
       options at an exercise price of $13.063 per share, 10,000 shares are
       subject to options at an exercise price of $13.75 per share, 3,000 shares
       are subject to options at an exercise price of $13.438 per share, 1,500
       shares are subject to options at an exercise price of $11.75 per share
       and 5,000 shares are subject to options at an exercise price of $13.00
       per share. The offering price for the remaining 2,839,250 shares not
       subject to options on the date hereof of $43.50 per share has been
       estimated solely for the purposes of determining the registration fee
       pursuant to Rule 457(c) under the Securities Act of 1933, as amended, on
       the basis of the average of the high and low prices of Advanced Radio
       Telecom Corp. Common Stock, par value $0.001 per share, reported on the
       Nasdaq National Market on March 9, 2000.

/(2)/  The maximum aggregate offering price consists of $109,875 payable in
       respect of 3,000 shares subject to options at an exercise price of
       $32.625 per share, plus $25,961,386.50 payable in respect of 801,500
       shares subject to options at an exercise price of $32.391 per share, plus
       $226,875 payable in respect of 7,500 shares subject to options at an
       exercise price of $30.25 per share, plus $210,000 payable in respect of
       15,000 shares subject to options at an exercise price of $14.00 per
       share, plus $4,087,500 payable in respect of 300,000 shares subject to
       options at an exercise price of $13.625 per share, plus $14,313 payable
       in respect of 1,000 shares subject to options at an exercise price of
       $14.313 per share, plus $20,625 payable in respect of 1,500 shares
       subject to options at an exercise price of $13.75 per share, plus
       $25,157.50 payable in respect of 2,500 shares subject to options at an
       exercise price of $10.063 per share, plus $44,814 payable in respect of
       3,000 shares subject to options at an exercise price of $14.938 per
       share, plus $18,187.50 payable in respect of 1,500 shares subject to
       options at an exercise price of $12.125 per share, plus $22,093.75
       payable in respect of 1,750 shares subject to options at an exercise
       price of $12.625 per share, plus $39,189 payable in respect of 3,000
       shares are subject to options at an exercise price of $13.063 per share,
       plus $137,500 payable in respect of 10,000 shares subject to options at
       an exercise price of $13.75 per share, plus $40,314 payable in respect of
       3,000 shares subject to options at an exercise price of $13.438 per
       share, plus $17,625 payable in respect of 1,500 shares subject to options
       at an exercise price of $11.75 per share, plus $65,000 payable in respect
       of 5,000 shares subject to options at an exercise price of $13.00 per
       share, plus $123,507,375 payable in respect of 2,839,250 shares that have
       not yet been subject to options on the date hereof.

================================================================================
EXPLANATORY NOTE

  This Registration Statement has been filed pursuant to General Instruction E
on Form S-8 to register 4,000,000 additional securities to be offered pursuant
to the Restated Equity Incentive Plan ("the Plan") of Advanced Radio Telecom
Corp. (the "Registrant" or the "Company").  A registration statement on Form S-8
(File No. 333-50155), filed with the Securities and Exchange Commission on April
15, 1998 to register 3,100,000 shares of Common Stock and Junior Preferred Stock
Purchase Rights issuable pursuant to the Plan and the 1997 Equity Incentive Plan
for Non-Employee Directors, is currently effective and is hereby incorporated
herein by reference.

                                      -2-
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 on Form S-8 to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Bellevue, State of Washington, on this 14th day
of March, 2000.

                                    ADVANCED RADIO TELECOM CORP.

                                    By: /s/ Robert S. McCambridge
                                        ---------------------------------
                                        Name:  Robert S. McCambridge
                                        Title: President

                               POWER OF ATTORNEY
                               -----------------

     Pursuant to the requirement of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.  Each person whose signature appears
below hereby authorizes and constitutes Robert S. McCambridge and Thomas M.
Walker, with full power of substitution, to execute in the name of and on behalf
of such person any amendment (including any post-effective amendment) to this
Registration Statement, and any subsequent registration statement for the same
offering that may be filed under Rule 462(b) under the Securities Act, and to
file the same, with exhibits thereto, and other documents in connection
therewith, making such changes in this Registration Statement and any subsequent
registration statement under Rule 462(b) as the person(s) so acting deems
appropriate.
Signature                  Title                     Date
---------                  -----                     -----
/s/ Robert S. McCambridge
-------------------------  President, Acting Chief   March 14, 2000
Robert S. McCambridge      Executive Officer and
                           Chief Financial Officer

/s/ Bandel Carano
-------------------------  Director                  March 14, 2000
Bandel Carano

/s/ Andrew I. Fillat
-------------------------  Director                  March 14, 2000
Andrew I. Fillat
-3-
/s/ Richard T. Liebhaber
-------------------------  Director                  March 14, 2000
Richard T. Liebhaber

/s/ James B. Murray, Jr.
-------------------------  Director                  March 14, 2000
James B. Murray, Jr.

/s/ Alan Z. Senter
-------------------------  Director                  March 14, 2000
Alan Z. Senter

/s/ Marc B. Weisberg
-------------------------  Director                  March 14, 2000
Marc B. Weisberg
-4-
EXHIBIT INDEX
Number  Title of Exhibit                              Page
------  --------------------------------------------  ----
5     Opinion of Ropes & Gray                        6

  23.1  Consent of PricewaterhouseCoopers L.L.P.       7

  23.2  Consent of Ropes & Gray (contained in the
        opinion filed as Exhibit 5 hereto)             6

  24    Power of Attorney (included as part of the
        signature page filed herewith)                 3
-5-