EarthLink (ELNK) 8-K Entry into a Material Definitive Agreement

Exhibit 4.1

NUMBER SHARES See Reverse for Certain Definitions INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE EARTHLINK HOLDINGS CORP. TOTAL AUTHORIZED ISSUE – 1,000 SHARES OF PAR VALUE COMMON STOCK SPECIMEN This is to Certify that is the owner of fully paid and non-assessable shares of the above Corporation transferable only on the books of the Corporation by the holder hereof in person or by duly authorized Attorney upon surrender of this Certificate properly endorsed. Witness, the seal of the Corporation and the signatures of its duly authorized officers. Dated Chief Executive Officer or Vice President Secretary or Assistant Secretary

EARTHLINK HOLDINGS CORP. The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: TEN COM — as tenants in common UNIF GIFT MIN ACT–________ Custodian ________ TEN ENT — as tenants by the entireties (Cust) (Minor) JT TEN — as joint tenants with right of under Uniform Gifts to Minors Act survivorship and not as tenants in common (State) UNIF TRF MIN ACT–________ Custodian (until age_____.) (Cust) ___________ under Uniform Transfers (Minor) To Minors Act _________________ (State) Additional abbreviations may also be used though not in the above list. For value received, hereby sell, assign and transfer unto PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) Shares of the Common Stock represented by the within Certificate, and do hereby irrevocably constitute and appoint Attorney to transfer the said Shares on the books of the within named Corporation with full power of substitution in the premises. Dated X X NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER. SIGNATURE(S) GUARANTEED: THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15. KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, MUTILATED OR DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.