CERTIFICATE OF INCORPORATION
                                          OF
                                  ICG SERVICES, INC.


                                      ARTICLE 1

                    The name of the corporation is ICG Services, Inc.

                                      ARTICLE 2

                    The address of the corporation's registered office in
          the State of Delaware is 1013 Centre Road, Wilmington, Delaware
          19805 (New Castle County).  The name of its registered agent at
          such address is The Prentice-Hall Corporation System, Inc.

                                      ARTICLE 3

                    The purposes for which the corporation is organized are
          to engage in any business and in any lawful act or activity for
          which corporations may be organized under the Delaware General
          Corporation Law and to possess and employ all powers and
          privileges now or hereafter granted or available under the laws
          of the State of Delaware to such corporations. 

                                      ARTICLE 4

                    (a)  AUTHORIZED SHARES.  The aggregate number of shares
                         -----------------
          which the corporation has authority to issue is 2,000.  The
          authorized shares consist of 1,000 shares of common stock with a
          par value of $.01 per share, such class being designated "common
          stock," and 1,000 shares of preferred stock with a par value of
          $.01 per share, such class being designated "preferred stock."

                    (b)  COMMON STOCK.  The common stock shall have
                         ------------
          unlimited voting rights, subject to the voting rights of any
          shares of preferred stock.  The common stock shall be entitled to
          receive the net assets of the corporation upon dissolution,
          subject to the rights of any shares of preferred stock to receive
          distributions upon dissolution.  The affirmative vote of a
          majority of all outstanding shares of the corporation's common
          stock shall be required for the stockholders to act.

                    (c)  PREFERRED STOCK.  Shares of preferred stock may be
                         ---------------
          issued from time to time in series, and the board of directors of
          the corporation is hereby authorized, subject to the limitations
          provided by law, to establish and designate one or more series of
          the preferred stock, to fix the number of shares constituting
          each series, and to fix the designations, powers, preferences and
          relative, participating, optional or other special rights, and
          qualifications, limitations or restrictions thereof, of each
          series and the variations and the relative rights, preferences
          and limitations as between series, and to increase and to
          decrease the number of shares constituting each series.  The
          authority of the Board of Directors of the corporation with
          respect to each series shall include, but shall not be limited
          to, the authority to determine the following:


     

                    (i)    The designation of such series.

                    (ii)   The number of shares initially constituting such
          series.

                    (iii)  The increase, and the decrease to a number not
          less than the number of the outstanding shares of such series, of
          the number of shares constituting such series theretofore fixed.

                    (iv)   The rate or rates, and the conditions upon and
          the times at which dividends on the shares of such series shall
          be paid, the preference or relation which such dividends shall
          bear to the dividends payable on any other class or classes or on
          any other series of stock of the corporation, and whether or not
          such dividends shall be cumulative, and, if such dividends shall
          be cumulative, the date or dates from and after which they shall
          accumulate.

                    (v)    Whether or not the shares of such series shall
          be redeemable, and, if such shares shall be redeemable, the terms
          and conditions of such redemption, including, but not limited to,
          the date or dates upon or after which such shares shall be
          redeemable and the amount per share which shall be payable upon
          such redemption, which amount may vary under different conditions
          and at different redemption dates.

                    (vi)    The rights to which the holders of the shares
          of such series shall be entitled upon the voluntary or
          involuntary liquidation, dissolution or winding up of, or upon
          any distribution of the assets of, the corporation, which rights
          may be different in the case of a voluntary liquidation,
          dissolution or winding up than in the case of such an involuntary
          event.

                    (vii)   Whether or not the shares of such series shall
          have voting rights, in addition to the voting rights provided by
          law, and, if such shares shall have such voting rights, the terms
          and conditions thereof, including, but not limited to, the right
          of the holders of such shares to vote as a separate class either
          alone or with the holders of shares of one or more other series
          of preferred stock and the right to have more than one vote per
          share.

                    (viii)  Whether or not a sinking fund or a purchase
          fund shall be provided for the redemption or purchase of the
          shares of such series, and, if such a sinking fund or purchase
          fund shall be provided, the terms and conditions thereof.

                    (ix)   Whether or not the shares of such series shall
          be convertible into, or exchangeable for, shares of any other
          class or classes or any other series of the same or any other
          class or classes of stock of the corporation, and, if provision
          be made for conversion or exchange, the terms and conditions of
          conversion or exchange, including, but not limited to, any
          provision for the adjustment of the conversion or exchange rate
          or the conversion or exchange price.

                    (x)    Any other relative rights, preferences and
          limitations.


                                      -2-
     

                                      ARTICLE 5

                    The names and mailing addresses of the persons who are
          to serve as the directors of the corporation until their
          successors are elected and qualified or their earlier resignation
          or removal are:

                    Name                     Mailing Address
                    ----                     ---------------

               J. Shelby Bryan          9605 East Maroon Circle, Suite 100
                                        Englewood, CO 80112
               James D. Grenfell        9605 East Maroon Circle, Suite 100
                                        Englewood, CO 80112
               David W. Garrison        2 North Second Street, Plaza A
                                        San Jose, CA 95113
               Sheldon S. Ohringer      9605 East Maroon Circle, Suite 100
                                        Englewood, CO 80112
               H. Don Teague            9605 East Maroon Circle, Suite 100
                                        Englewood, CO 80112

                    The number of directors of the corporation shall be
          fixed from time to time in the manner provided in the bylaws and
          may be increased or decreased from time to time in the manner
          provided in the bylaws.  Election of directors need not be by
          written ballot except and to the extent provided in the bylaws of
          the corporation.

                    The affirmative vote of a majority of all directors
          constituting the board of directors shall be required for the
          board of directors to act.

                                      ARTICLE 6

                    The board of directors of the corporation is expressly
          authorized to make, alter or repeal the bylaws of the
          corporation, but such authorization shall not divest the
          stockholders of the power, nor limit their power, to adopt, amend
          or repeal bylaws.

                                      ARTICLE 7

                    No director of the corporation shall be personally
          liable to the corporation or its stockholders for monetary
          damages for breach of fiduciary duty as a director, except as to
          liability (i) for any breach of the director's duty of loyalty to
          the corporation or its stockholders, (ii) for acts or omissions
          not in good faith or which involve intentional misconduct or a
          knowing violation of law, (iii) for violations of Section 174 of
          the Delaware General Corporation Law or (iv) for any transaction
          from which the director derived any improper personal benefit. 
          If the Delaware General Corporation Law hereafter is amended to
          eliminate or limit further the liability of a director, then, in
          addition to the elimination and limitation of liability provided


                                      -3-
     

          by the preceding sentence, the liability of each director shall
          be eliminated or limited to the fullest extent provided or
          permitted by the amended Delaware General Corporation Law.  Any
          repeal or modification of this Article 7 shall not adversely
          affect any right or protection of a director under this Article 7
          as in effect immediately prior to such repeal or modification
          with respect to any liability that would have accrued, but for
          this Article 7, prior to such repeal or modification.

                                      ARTICLE 8

                    The corporation shall have authority, to the fullest
          extent now or hereafter permitted by the Delaware General
          Corporation Law, or by any other applicable law, to enter into
          any contract or transaction with one or more of its directors or
          officers, or with any corporation, partnership, joint venture,
          trust, association or other entity in which one or more of its
          directors or officers are directors or officers or have a
          financial interest, notwithstanding such relationships and
          notwithstanding the fact that the director or officer is present
          at or participates in the meeting of the board of directors or
          committee thereof which authorizes the contract or transaction.

                                      ARTICLE 9

                    The corporation shall indemnify, to the fullest extend
          permitted by applicable law in effect from time to time, any
          person, and the estate and personal representative of any such
          person, against all liability and expense (including attorneys'
          fees) incurred by reason of the fact that he is or was a director
          or officer of the corporation or, while serving as a director or
          officer of the corporation, he is or was serving at the request
          of the corporation as a director, officer, partner, trustee,
          employee, fiduciary, or agent of, or in any similar managerial or
          fiduciary position of, another domestic or foreign corporation or
          other individual or entity or of an employee benefit plan.  The
          corporation shall also indemnify any person who is serving or has
          served the corporation as director, officer, employee, fiduciary,
          or agent, and that person's estate and personal representative,
          to the extent and in the manner provided in any bylaw, resolution
          of the shareholders or directors, contract or otherwise, so long
          as such provision is legally permissible.  Expenses (including
          attorneys' fees) incurred in defending any civil, criminal,
          administrative or investigative action, suit or proceeding may be
          paid by the corporation in advance of the final disposition of
          such action, suit or proceeding as authorized by the board of
          directors in the specific case upon receipt of an undertaking by
          or on behalf of the director, officer, employee or agent to repay
          such amount unless it shall ultimately be determined that he is
          entitled to be indemnified by the corporation as authorized in
          this Article or otherwise.  The indemnification provided by this
          Article shall not be deemed exclusive of any other rights to
          which those seeking indemnification may be entitled under these
          Articles or any agreement or vote of stockholders or
          disinterested directors or otherwise, both as to action in his
          official capacity and as to action in another capacity while
          holding such office, and shall continue as to a person, officer,
          employee or agent and shall inure to the benefit of the heirs,
          executors and administrators of such a person.


                                      -4-
     

                                      ARTICLE 10

                    Whenever a compromise or arrangement is proposed
          between this corporation and its creditors or any class of them
          and/or between this corporation and its stockholders or any class
          of them, any court of equitable jurisdiction within the State of
          Delaware may, on the application in a summary way of this
          corporation or of any creditor or stockholder thereof or on the
          application of any receiver or receivers appointed for this
          corporation under the provisions of Section 291 of Title 8 of the
          Delaware Code or on the application of trustees in dissolution or
          of any receiver or receivers appointed for this corporation under
          the provisions of Section 279 of Title 8 of the Delaware Code
          order a meeting of the creditors or class of creditors, and/or of
          the stockholders or class of stockholders of this corporation, as
          the case may be, to be summoned in such manner as the said court
          directs.  If a majority in number representing three-fourths in
          value of the creditors or class of creditors, and/or of the
          stockholders or class of stockholders of this corporation, as the
          case may be, agree to any compromise or arrangement and to any
          reorganization of this corporation as consequence of such
          compromise or arrangement, the said compromise or arrangement and
          the said reorganization shall, if sanctioned by the court to
          which the said application has been made, be binding on all the
          creditors or class of creditors, and/or on all the stockholders
          or class of stockholders, of this corporation, as the case may
          be, and also on this corporation.

               Executed January 23, 1998.



                                             /s/ Robert Mintz
                                             ---------------------------
                                             Robert Mintz



                                      -5-