**Exhibit31.2**

**CERTIFICATIONOF CFO PURSUANT TOSECURITIES EXCHANGE ACT RULES 13a-14 AND 15d-14AS ADOPTED PURSUANT TOSECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

I, Kevin M. Dotts, theChief Financial Officer of EarthLink, Inc., certify that:

1.       I have reviewed thisquarterly report on Form 10-Q for the quarter ended June 30, 2007 ofEarthLink, Inc.;

2.       Based on my knowledge, thisreport does not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading withrespect to the period covered by this report;

3.       Based on my knowledge, thefinancial statements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operationsand cash flows of the registrant as of, and for, the periods presented in thisreport;

4.       The registrant’s othercertifying officer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)and 15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)       designed suchdisclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

(b)      designed suchinternal control over financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial reporting and the preparationof financial statements for external purposes in accordance with generallyaccepted accounting principles;

(c)       evaluated theeffectiveness of the registrant’s disclosure controls and procedures andpresented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and

(d)       disclosed in this report anychange in the registrant’s internal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter that has materiallyaffected, or is reasonably likely to materially affect, the registrant’sinternal control over financial reporting; and

5.       The registrant’s othercertifying officer and I have disclosed, based on our most recent evaluation ofinternal control over financial reporting, to the registrant’s auditors and theaudit committee of the registrant’s board of directors:

(a)       allsignificant deficiencies and material weaknesses in the design or operation ofinternal controls which are reasonably likely to adversely affect theregistrant’s ability to record, process, summarize and report financial information;and

(b)       any fraud, whether or notmaterial, that involves management or other employees who have a significantrole in the registrant’s internal control over financial reporting.
| Date: August 6, 2007 |   | By:    | /s/                     | KEVIN M. DOTTS |
|----------------------|--------|--------|-------------------------|----------------|
|                 |   |   | Kevin M. Dotts          |
|                 |   |   | Chief Financial Officer |

 

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