Exhibit 3.1

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

INTELIQUENT, INC.

(a Delaware corporation)

ARTICLE I.

The name of the corporation is Inteliquent, Inc. (the “Corporation”).

ARTICLE II.

The address of the Corporation’s registered office in the State of Delaware is 160 Greentree Drive, Suite 101, Dover, Delaware 19904, in the county of Kent. The name of its registered agent at such address is National Registered Agents, Inc.

ARTICLE III.

The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of the State of Delaware (the “DGCL”) as it now exists or may hereafter be amended and supplemented.

ARTICLE IV.

The total number of shares of all classes of stock that the Corporation is authorized to issue is one thousand (1,000) shares, all of which shall be common stock with a par value of one tenth of one cent ($0.001).

ARTICLE V.

From time to time any of the provisions of this certificate of incorporation may be amended, altered or repealed, and other provisions authorized by the laws of the State of Delaware at the time in force may be added or inserted in the manner and at the time prescribed by said laws, and all rights at any time conferred upon the stockholders of the Corporation by this certificate of incorporation are granted subject to the provisions of this Article V.

ARTICLE VI.

In furtherance and not in limitation of the rights, powers, privileges and discretionary authority granted or conferred by the DGCL or other statutes or laws of the State of Delaware, the board of directors of the Corporation (the “Board of Directors”) is expressly authorized to make, alter, amend or repeal the bylaws of the Corporation, without any action on the part of the stockholders, but the stockholders may make additional bylaws and may alter, amend or repeal any bylaw whether adopted by them or otherwise. The Corporation may in its bylaws confer powers upon its Board of Directors in addition to the foregoing and in addition to the powers and authorities expressly conferred upon the Board of Directors by applicable law.

ARTICLE VII.

Election of directors need not be by written ballot unless the bylaws of the Corporation shall so provide.

ARTICLE VIII.

To the fullest extent permitted by the DGCL, as it now exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader limitation of liability to its directors than permitted prior thereto), no director of the Corporation shall be liable to the Corporation or its stockholders for monetary damages arising from a breach of fiduciary duty owed to the Corporation or its stockholders. Any repeal or modification of this Article VIII shall not in any way diminish any right or protection of a director of the Corporation existing prior to the time of such repeal or modification.

ARTICLE IX.

(A) Each person who was or is made a party or is threatened to be made a party to or is involved (including, without limitation, as a witness) in any actual or threatened action, suit or proceeding, whether civil, criminal, administrative or investigative (a “proceeding”), by reason of the fact that he or she is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as an employee or agent of the Corporation or as a director, officer, partner, member, trustee, administrator, employee or agent of another corporation or of a partnership, joint venture, limited liability company, trust or other enterprise, including service with respect to an employee benefit plan or any trust associated therewith (an “Indemnitee”), whether the basis of such proceeding is alleged action in an official capacity as a director or officer or in any other capacity while serving as a director or officer, shall be indemnified and held harmless by the Corporation to the fullest extent authorized by the DGCL, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader indemnification rights than permitted prior thereto), against all expenses, liabilities and losses (including attorneys’ fees and related disbursements, judgments, fines, excise taxes or penalties under the Employee Retirement Income Security Act of 1974, as amended from time to time (“ERISA”), penalties and amounts paid or to be paid in settlement) reasonably incurred or suffered by such Indemnitee in connection therewith, and such indemnification shall continue as to an Indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the Indemnitee’s heirs, executors and administrators; provided, however, that except as provided in Section B of this Article IX with respect to proceedings to enforce rights to indemnification, the Corporation shall indemnify any such Indemnitee in connection with a proceeding (or part thereof) initiated by such Indemnitee only if such proceeding (or part thereof) was authorized by the Board of Directors. The right to indemnification conferred in this Section A of Article IX shall be a contract right and shall include the obligation of the Corporation to pay the expenses incurred in defending any such proceeding in advance of its final disposition (an “advance of expenses”); provided, however, that advancement of expenses incurred by an Indemnitee shall be made only upon delivery to the Corporation of an undertaking (an “undertaking”), by or on behalf of such Indemnitee, to repay all amounts so advanced if it shall ultimately be determined by final judicial decision from which there is no further right to appeal (a “final adjudication”) that such Indemnitee is not entitled to be indemnified for such expenses under this Section A of Article IX or otherwise. The Corporation may, by action of the Board of Directors, provide indemnification to employees and agents of the Corporation with the same or lesser scope and effect as the foregoing indemnification of directors and officers.

(B) Procedure for Indemnification. Any indemnification of a director or officer of the Corporation or advance of expenses (including attorneys’ fees, costs and charges) under Section A of this Article IX shall be made promptly, and in any event within forty-five (45) days (or, in the case of an advance of expenses, twenty (20) days, provided that the director or officer has delivered the undertaking contemplated by Section A of this Article IX), upon the written request of the director or officer. If a determination by the Corporation that the director or officer is entitled to indemnification pursuant to this Article IX is required, and the Corporation fails to respond within sixty (60) days to a written request for indemnity, the Corporation shall be deemed to have approved the request. If the Corporation denies a written request for indemnification or an advance of expenses, in whole or in part, or if payment

in full pursuant to such request is not made within forty-five (45) days (or, in the case of an advance of expenses, twenty (20) days, provided that the director or officer has delivered the undertaking contemplated by Section A of this Article IX), the right to indemnification or advances as granted by this Article IX shall be enforceable by the director or officer in any court of competent jurisdiction. Such person’s costs and expenses incurred in connection with successfully establishing his or her right to indemnification, in whole or in part, in any such action shall also be indemnified by the Corporation. It shall be a defense to any such action (other than an action brought to enforce a claim for advancement of expenses where the undertaking required pursuant to Section A of this Article IX, if any, has been tendered to the Corporation) that the claimant has not met the standards of conduct which make it permissible under the DGCL for the Corporation to indemnify the claimant for the amount claimed, but the burden of such defense shall be on the Corporation. Neither the failure of the Corporation (including its Board of Directors, independent legal counsel or its stockholders) to have made a determination prior to the commencement of such action that indemnification of the claimant is proper in the circumstances because he or she has met the applicable standard of conduct set forth in the DGCL, nor an actual determination by the Corporation (including its Board of Directors, independent legal counsel or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct. The procedure for indemnification of other employees and agents for whom indemnification is provided pursuant to Section A of this Article IX shall be the same procedure set forth in this Section B of Article IX for directors or officers, unless otherwise set forth in the action of the Board of Directors providing indemnification for such employee or agent.

(C) Insurance. The Corporation may purchase and maintain insurance on its own behalf and on behalf of any person who is or was or has agreed to become a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against any expense, liability or loss asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power to indemnify such person against such expense, liability or loss under the DGCL.

(D) Service for Subsidiaries. Any person serving as a director, officer, employee or agent of another corporation, partnership, limited liability company, joint venture or other enterprise, at least fifty percent (50%) of whose equity interests are owned by the Corporation (a “subsidiary” for purposes of this Article IX) shall be conclusively presumed to be serving in such capacity at the request of the Corporation.

(E) Reliance. Persons who after the date of the adoption of this provision become or remain directors or officers of the Corporation or who, while a director or officer of the Corporation, become or remain a director, officer, employee or agent of a subsidiary, shall be conclusively presumed to have relied on the rights to indemnity, advance of expenses and other rights contained in this Article IX in entering into or continuing such service. The rights to indemnification and to the advance of expenses conferred in this Article IX shall apply to claims made against an Indemnitee arising out of acts or omissions which occurred or occur both prior and subsequent to the adoption hereof.

(F) Non-Exclusivity of Rights. The rights to indemnification and to the advance of expenses conferred in this Article IX shall not be exclusive of any other right which any person may have or hereafter acquire under this Amended and Restated Certificate of Incorporation or under any statute, bylaw, agreement, vote of stockholders or disinterested directors or otherwise.

(G) Merger or Consolidation.. For the purposes of this Article IX, references to the “Corporation” shall include, in addition to the resulting Corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers and

employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise shall stand in the same position under this Article IX, with respect to the resulting or surviving Corporation, as he or she would have with respect to such constituent corporation if its separate existence had continued.

(H) Savings Clause. If this Article IX or any portion hereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify each person entitled to indemnification under Section A of this Article IX as to all expense, liability and loss (including attorneys’ fees and related disbursements, judgments, fines, ERISA excise taxes and penalties, penalties and amounts paid or to be paid in settlement) actually and reasonably incurred or suffered by such person and for which indemnification is available to such person pursuant to this Article IX to the fullest extent permitted by any applicable portion of this Article IX that shall not have been invalidated and to the fullest extent permitted by applicable law.