UNITED STATES

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

Date of Report (Date of earliest event reported): March 9, 2012

(Exact name of registrant as specified in its charter)

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (919) 297-1600

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Item 1.01 Entry into a Material Definitive Agreement.

On March 9, 2012, certain subsidiaries of Dex One Corporation (“the Company”) the respective Agent (as defined below), and the respective Lenders (as defined below) under each such subsidiary’s respective Credit Agreement (as defined below) entered into the (i) First Amendment (the “Dex East Amendment”) to the Credit Agreement, dated as of October 24, 2007, as amended and restated as of January 29, 2010 (the “Dex East Credit Agreement”), by and among Dex Media East, Inc., as borrower (“Dex East”), the Company, Dex Media, Inc. (“Dex Media”), the lenders from time to time parties thereto (the “Dex East Lenders”), and JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “East Administrative Agent”), (ii) First Amendment (the “Dex West Amendment”) to the Credit Agreement, dated as of June 6, 2008, as amended and restated as of January 29, 2010 (the “Dex West Credit Agreement”), by and among Dex Media West, Inc., as borrower (“Dex West”), the Company, Dex Media, the lenders from time to time parties thereto (the “Dex West Lenders”), and JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “West Administrative Agent”), and (iii) First Amendment (the “RHDI Amendment,” and together with the Dex East Amendment and the Dex West Amendment, collectively, the “Amendments”) to the Third Amended and Restated Credit Agreement, dated as of January 29, 2010 (the “RHDI Credit Agreement,” and together with the Dex East Credit Agreement and the Dex West Credit Agreement, each a “Credit Agreement” and collectively, the “Credit Agreements”), by and among R.H. Donnelly Inc., as borrower (“RHDI,” and together with Dex East and Dex West, each a “Borrower” and collectively, the “Borrowers”), the Company, the lenders from time to time parties thereto (the “RHDI Lenders,” and collectively with the Dex East Lenders and the Dex West Lenders, the “Lenders”), and Deutsche Bank Trust Company Americas, as administrative agent and collateral agent (in such capacity, the “RHDI Administrative Agent,” and together with the East Administrative Agent and the West Administrative Agent, collectively, the “Agents”).

The material terms of the Amendments include the following:

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The above summary of the Amendments is qualified in its entirety by reference to the text of each of the Amendments, copies of which are included as Exhibits 10.1, 10.2 and 10.3 to this Current Report on Form 8-K. Such exhibits are incorporated herein by reference.

On March 9, 2012 the Company issued a press release regarding the Credit Agreement Amendments. A copy of this press release is attached as Exhibit 99.1 to this Form 8-K.

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Item 9.01 Financial Statements and Exhibits

(d) Exhibits

SIGNATURES

Pursuant to 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.

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EXHIBIT INDEX

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