content: <PAGE>
   
                        SECURITIES AND EXCHANGE COMMISSION
                              Washington, D.C. 20549
  
  
  
                                     FORM 8-K
  
  
  
                 Current Report Pursuant to Section 13 or 15(d) of
                        The Securities Exchange Act of 1934
  
  
                                 February 5, 1998
                 Date of Report (Date of earliest event reported)
  
  
  
                          CONCENTRIC NETWORK CORPORATION
              (Exact name of registrant as specified in its charter)
  
  
  
             Delaware                      000-22575               65-0257497
          --------------                ---------------         ----------------
  (State or other jurisdiction of   (Commission File Number)    (I.R.S. Employer
          incorporation)                                       Identification No.)
  
  
  
                               10590 N. Tantau Avenue
                            Cupertino, California 95014
                      (Address of principal executive offices)
  
                                   (408) 342-2800
                (Registrant's telephone number, including area code)
  <PAGE>
   
  ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS.
            ------------------------------------ 
  
            On February 5, 1998, Concentric Network Corporation, a Delaware
  corporation (the "Registrant"), acquired all of the outstanding capital stock of
  InterNex Information Services, Inc., a California corporation ("InterNex") from
  InterNex Communications, Inc., a California corporation and owner of all of the
  issued and outstanding shares of capital stock of InterNex ("Holding Company"),
  pursuant to a Share Acquisition Agreement, dated February 1, 1998, by and among
  the Registrant, InterNex and Holding Company.  Registrant paid $16.75 million in
  cash to Holding Company as consideration for all of the issued and outstanding
  shares of capital stock of InterNex.  The source of such funds was working
  capital of the Registrant.  The amount of consideration for the transaction was
  determined by arms-length negotiations between the parties.
  
  ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.
            --------------------------------- 
  
            The following financial statements and exhibits are filed as part of
  this report, where indicated.
  
       (a)  Financial statements of business acquired, prepared pursuant to Rule 
            3-05 of Regulation S-X:
  
   
  
            Independent Auditors' Report
            Balance Sheets
            Statements of Operations and Retained Earnings
            Statements of Cash Flows
            Notes to Financial Statements
  
            It is impracticable for the Registrant to provide the required
            financial statements of InterNex for this filing. The required
            financial statements will be filed within 60 days of the date of this
            report.
  
       (b)  Pro forma financial information required pursuant to Article 11 of
            Regulation S-X:
  
   
  
            Unaudited Pro Forma Consolidated Balance Sheet
            Unaudited Pro Forma Consolidated Statement of Operations
            Notes to Pro Forma Consolidated Financial Information
  
            It is impracticable for the Registrant to file the required pro forma
            financial information with this filing. Such pro forma financial
            information will be filed within 60 days of the date of this report.
  
                                         2
  <PAGE>
   
       (c)  Exhibits in accordance with Item 601 of Regulation S-K:
  
       Exhibits.
       -------- 
  
            2.1    Share Acquisition Agreement, dated as of February 1, 1998, by
                   and among Registrant, InterNex Communications, Inc. and
                   InterNex Information Services, Inc.
  
            23.1*  Consent of Independent Auditors.
  
  ____________
  *To be filed by amendment.
  
                                         3
  <PAGE>
   
                                     SIGNATURES
  
  
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
                                      CONCENTRIC NETWORK CORPORATION
  
  
  
  Dated:  February  18, 1998            By: /s/ Michael Anthofer
                                            ____________________________________
                                                Michael Anthofer
                                                Senior Vice President, Chief 
                                                Financial Officer
  
                                         4
  <PAGE>
   
                                 INDEX TO EXHIBITS
  
  
  EXHIBIT
  NUMBER                              DESCRIPTION
   
    2.1        Share Acquisition Agreement, dated as of February 1, 1998, by and
               among Registrant, InterNex Communications, Inc. and InterNex
               Information Services, Inc.
   
   23.1*       Consent of Independent Auditors.
   
  _________________
  *To be filed by amendment.
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text: SECURITIES AND EXCHANGE COMMISSION
                              Washington, D.C. 20549
  
                                     FORM 8-K
  
                 Current Report Pursuant to Section 13 or 15(d) of
                        The Securities Exchange Act of 1934
  
                                 February 5, 1998
                 Date of Report (Date of earliest event reported)
  
                          CONCENTRIC NETWORK CORPORATION
              (Exact name of registrant as specified in its charter)
  
             Delaware                      000-22575               65-0257497
          --------------                ---------------         ----------------
  (State or other jurisdiction of   (Commission File Number)    (I.R.S. Employer
          incorporation)                                       Identification No.)
  
                               10590 N. Tantau Avenue
                            Cupertino, California 95014
                      (Address of principal executive offices)
  
                                   (408) 342-2800
                (Registrant's telephone number, including area code)
  ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS.
            ------------------------------------ 
  
            On February 5, 1998, Concentric Network Corporation, a Delaware
  corporation (the "Registrant"), acquired all of the outstanding capital stock of
  InterNex Information Services, Inc., a California corporation ("InterNex") from
  InterNex Communications, Inc., a California corporation and owner of all of the
  issued and outstanding shares of capital stock of InterNex ("Holding Company"),
  pursuant to a Share Acquisition Agreement, dated February 1, 1998, by and among
  the Registrant, InterNex and Holding Company.  Registrant paid $16.75 million in
  cash to Holding Company as consideration for all of the issued and outstanding
  shares of capital stock of InterNex.  The source of such funds was working
  capital of the Registrant.  The amount of consideration for the transaction was
  determined by arms-length negotiations between the parties.
  
  ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.
            --------------------------------- 
  
            The following financial statements and exhibits are filed as part of
  this report, where indicated.
  
       (a)  Financial statements of business acquired, prepared pursuant to Rule 
            3-05 of Regulation S-X:
  
   
  
            Independent Auditors' Report
            Balance Sheets
            Statements of Operations and Retained Earnings
            Statements of Cash Flows
            Notes to Financial Statements
  
            It is impracticable for the Registrant to provide the required
            financial statements of InterNex for this filing. The required
            financial statements will be filed within 60 days of the date of this
            report.
  
       (b)  Pro forma financial information required pursuant to Article 11 of
            Regulation S-X:
  
   
  
            Unaudited Pro Forma Consolidated Balance Sheet
            Unaudited Pro Forma Consolidated Statement of Operations
            Notes to Pro Forma Consolidated Financial Information
  
            It is impracticable for the Registrant to file the required pro forma
            financial information with this filing. Such pro forma financial
            information will be filed within 60 days of the date of this report.
  
                                         2
  (c)  Exhibits in accordance with Item 601 of Regulation S-K:
  
       Exhibits.
       -------- 
  
            2.1    Share Acquisition Agreement, dated as of February 1, 1998, by
                   and among Registrant, InterNex Communications, Inc. and
                   InterNex Information Services, Inc.
  
            23.1*  Consent of Independent Auditors.
  
  ____________
  *To be filed by amendment.
  
                                         3
  SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
                                      CONCENTRIC NETWORK CORPORATION
  
  Dated:  February  18, 1998            By: /s/ Michael Anthofer
                                            ____________________________________
                                                Michael Anthofer
                                                Senior Vice President, Chief 
                                                Financial Officer
  
                                         4
  INDEX TO EXHIBITS
  
  EXHIBIT
  NUMBER                              DESCRIPTION
   
    2.1        Share Acquisition Agreement, dated as of February 1, 1998, by and
               among Registrant, InterNex Communications, Inc. and InterNex
               Information Services, Inc.
   
   23.1*       Consent of Independent Auditors.
   
  _________________
  *To be filed by amendment.