AMENDMENT NUMBER FOUR

                         TO THE GENERAL AGREEMENT AMONG

        KMC TELECOM INC., KMC TELECOM II, INC., KMC TELECOM III, INC.,

             KMC TELECOM IV, INC., KMC TELECOM OF VIRGINIA, INC.,

            KMC TELECOM LEASING I LLC, KMC TELECOM LEASING II LLC,

           KMC TELECOM LEASING III LLC, KMC TELECOM LEASING IV LLC

                          AND LUCENT TECHNOLOGIES INC.

      This Amendment  Number Four  (hereinafter  this "AMENDMENT  FOUR") is made
effective  as of February 15,  2000,  by and among KMC Telecom  Inc., a Delaware
corporation,  KMC Telecom II,  Inc.,  a Delaware  corporation,  KMC Telecom III,
Inc., a Delaware corporation,  KMC Telecom IV, Inc., a Delaware corporation, KMC
Telecom of  Virginia,  Inc.,  a Virginia  public  service  company,  KMC Telecom
Leasing I LLC, a Delaware limited liability company, KMC Telecom Leasing II LLC,
a Delaware limited  liability  company,  KMC Telecom Leasing III LLC, a Delaware
limited  liability  company,  KMC  Telecom  Leasing IV LLC,  a Delaware  limited
liability  company,  each with  offices  located at 1545  Route 206,  Suite 300,
Bedminster,   New  Jersey  07921  (hereinafter   collectively   referred  to  as
"CUSTOMER"), and Lucent Technologies Inc., a Delaware corporation acting through
its Global Service Providers Group, with offices located at 600 Mountain Avenue,
Murray Hill, New Jersey 07074 (hereinafter "SELLER").

      WHEREAS,  Customer and Seller previously entered into that certain General
Agreement  (Contract Number  LNM970313MP),  effective March 6, 1997, as modified
and amended by Amendment Number One (Contract Number LNM970922MP),  effective as
of October 15, 1997,  as further  modified and amended by Amendment  Number Two,
effective as of December 22, 1998, as further  modified and amended by Amendment
Number  Three,  effective as of November  15, 1999 (as so amended,  the "GENERAL
AGREEMENT"),  setting  forth the terms and  conditions  pursuant to which Seller
agreed to supply and Customer  agreed to procure  certain of Seller's  Products,
Licensed Materials and Services (as such terms are defined therein); and

      WHEREAS, Customer and Seller desire to amend and modify the General
Agreement as set forth herein; and

      WHEREAS,  all terms used  herein  but not  defined  herein  shall have the
meanings ascribed to them in the General Agreement.

      NOW THEREFORE,  in  consideration  of the mutual promises  hereinafter set
forth and other good and valuable consideration,  the receipt and sufficiency of
which is hereby acknowledged, the parties agree as follows:




1.    SCOPE OF GENERAL AGREEMENT

      The definition of "Customer"  contained in the General Agreement is hereby
amended to  additionally  include  KMC III  Services  LLC,  a  Delaware  limited
liability company ("KMC SERVICES"),  it being the intent and understanding among
the parties that KMC Services shall be authorized to procure Products,  Licensed
Materials  and  Services  from  Seller  under  and  pursuant  to the  terms  and
conditions of the General Agreement.

2.    ENTIRE AGREEMENT

      Except as specifically modified, amended or supplemented herein, all terms
and conditions of the General  Agreement  shall remain in full force and effect.
The  terms  and   conditions   contained  in  this   Amendment  Four  and  those
nonconflicting terms and conditions of the General Agreement supersede all prior
oral and  written  understandings  among the parties  and shall  constitute  the
entire  agreement  among the parties with respect to the subject  matter herein.
This Amendment  Number Four shall not be modified or amended except by a writing
signed by an authorized representative of each of the parties.

3.    COUNTERPARTS

      This Amendment  Number Four may be executed in any number of counterparts,
each of which  when so  executed  shall be deemed to be an  original  and all of
which taken together shall constitute one and the same instrument.

4.    GOVERNING LAW

      This  Amendment  Number Four shall be governed by the laws of the State of
New York.








            IN WITNESS  WHEREOF,  the parties have caused this Amendment  Number
Four to be executed by their duly authorized  representatives  as of the day and
year first above written.


KMC TELECOM INC.                          KMC TELECOM LEASING I LLC
                                          By: KMC Telecom Inc., as Sole Member

By:   /s/                                 By:   /s/
      --------------------------                --------------------------------
      Name: James D. Grenfell                   Name: James D. Grenfell
      Title:Chief Financial Officer             Title:Chief Financial Officer


KMC TELECOM II, INC.                      KMC TELECOM LEASING II LLC
                                          By: KMC Telecom II, Inc., as Sole
Member

By:   /s/                                 By:   /s/
      -----------------------------             --------------------------------
      Name: James D. Grenfell                  Name: James D. Grenfell
      Title:Chief Financial Officer            Title:Chief Financial Officer


KMC TELECOM III, INC.                     KMC TELECOM LEASING III LLC
                                          By: KMC Telecom III, Inc., as Sole
                                              Member

By:   /s/                                 By:   /s/
      -----------------------------             --------------------------------
      Name: James D. Grenfell                   Name: James D. Grenfell
      Title:Chief Financial Officer             Title:Chief Financial Officer

KMC TELECOM IV, INC.                      KMC TELECOM LEASING IV LLC
                                          By: KMC Telecom IV, Inc., as Sole
                                              Member


By:   /s/                                 By:   /s/
      -----------------------------             --------------------------------
      Name: James D. Grenfell                   Name: James D. Grenfell
      Title:Chief Financial Officer             Title:Chief Financial Officer


KMC TELECOM OF VIRGINIA, INC.             KMC III SERVICES LLC
                                          By: KMC Telecom III, Inc., as Sole
                                              Member



By:   /s/                                 By:   /s/
      -----------------------------             --------------------------------
      Name: James D. Grenfell                   Name: James D. Grenfell
      Title:Chief Financial Officer             Title:Chief Financial Officer





LUCENT TECHNOLOGIES INC.



By:   /s/
      -----------------------------
      Name: William H. Pittman
      Title:Area Vice President