EarthLink (ELNK) 10-K 2016 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements of EarthLink Holdings Corp.:

(1) Registration Statement (Form S-8 No. 333-39456) pertaining to the EarthLink Holdings Corp. Stock Incentive Plan and the Stock Option Plan for Non-Employee Directors

(2) Registration Statement (Form S-8 No. 333-173889) pertaining to the EarthLink Holdings Corp. 2011 Equity and Cash Incentive Plan

(1) Registration Statement (Form S-8 No. 333-210940) pertaining to the EarthLink Holdings Corp. 2016 Equity and Cash Incentive Plan,

of our reports dated February 24, 2017, with respect to the consolidated financial statements of EarthLink Holdings Corp. and the effectiveness of internal control over financial reporting of EarthLink Holdings Corp. included in this Annual Report (Form 10-K) of EarthLink Holdings Corp. for the year ended December 31, 2016.

/s/ Ernst & Young LLP

Atlanta, Georgia

February 24, 2017