Exhibit 99.1

EARTHLINK ANNOUNCES SECOND QUARTER 2011 RESULTS

ATLANTA — July 28, 2011 — EarthLink, Inc. (NASDAQ: ELNK) today announced financial results for its second quarter ended June 30, 2011. EarthLink’s second quarter results include a full quarter of operating results from the acquisition of One Communications which closed on April 1, 2011.

Highlights for the second quarter include:

·                  Net income of $6.5 million or $0.06 per share

·                  Adjusted EBITDA (a non-GAAP measure) of $88.9 million

·                  Free cash flow (a non-GAAP measure) of $65.8 million

·                  Raised full year 2011 Adjusted EBITDA and Free Cash Flow guidance

·                  Repurchased 2.4 million shares of stock

·                  Ending cash and marketable securities balance of $490.5 million

“Over the past year, EarthLink has redefined our company in a manner that provides long-term value creation potential for our shareholders.  This quarter, EarthLink Business generated approximately three-quarters of our revenue and a significant amount of our Adjusted EBITDA.  Our IP network services business is gaining momentum and our emerging Managed Services capabilities are creating new opportunities for EarthLink to be a trusted IT partner businesses can rely on to securely connect to and leverage the growing influence of cloud-based services,” explained EarthLink Chairman and Chief Executive Officer Rolla P. Huff. “We are making meaningful progress in our integration efforts, and putting organic growth within reach.”

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Financial and Operating Results

For the second quarter of 2011, EarthLink reported revenue of $363.6 million, a 50% increase from the first quarter of 2011, primarily due to the acquisition of One Communications, and a 138% increase over the second quarter of 2010, primarily due to the acquisitions of ITC^DeltaCom and One Communications.  As a result of these acquisitions and increasing sales momentum at EarthLink Business, business services comprised 74% of EarthLink’s total revenue in the second quarter of 2011, up from 59% in the prior quarter and 21% in the year-ago quarter.

Within the consumer segment, revenue churn continued to attenuate with revenue in the second quarter of 2011 down 5% from the first quarter of 2011. Broadband services comprised 65% of EarthLink’s consumer access revenue in the second quarter of 2011. This quarter marks EarthLink’s third consecutive quarter of record consumer retention results. Consumer subscriber churn for the second quarter of 2011 was 2.6%, down from 2.7% in the first quarter of 2011 and 3.0% in the second quarter of 2010.

EarthLink’s total sales and marketing, operations, customer support, and general and administrative expenses for the second quarter of 2011 were $113.8 million or 31% of revenue.

Profitability and Other Financial Measures

Second quarter of 2011 net income was $6.5 million, or $0.06 per share, as compared to $16.4 million, or $0.15 per share in the first quarter of 2011, and $28.0 million, or $0.26 per share, in the second quarter of 2010.

The company reported Adjusted EBITDA (a non-GAAP measure, see definition in “Non-GAAP Measures” below) of $88.9 million in the second quarter of 2011, as compared to $69.7 million in the first quarter 2011 and $56.7 million in the second quarter of 2010.  The increase compared to the prior year quarter reflects the inclusion of One Communications’ and Deltacom’s operating results and the increase compared to the prior sequential quarter reflects the inclusion of One Communications’ operating results. The increases also reflect increased sales momentum in the EarthLink Business segment, constant management of cost structure, progress in achieving synergies ahead of schedule, and consistently high consumer customer retention.

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Balance Sheet and Cash Flow

EarthLink generated free cash flow (a non-GAAP measure, see definition in “Non-GAAP Measures” below) of $65.8 million in the second quarter of 2011, as compared to $52.0 million in the first quarter of 2011 and $54.0 million in the year-ago quarter.

The company reported cash and marketable securities of $490.5 million as of June 30, 2011, a decrease of $61.1 million from the prior quarter ended March 31, 2011. EarthLink used approximately $336 million of cash in connection with the closing of its acquisition of One Communications on April 1, 2011, which included the repayment of One Communications debt. Second quarter 2011 capital expenditures were $23.2 million. Also during the quarter, the company repurchased 2.4 million shares of common stock at an average price of $7.60 per share and made $5.6 million of dividend payments to shareholders.

In May 2011, EarthLink issued $300 million aggregate principal amount of 8-7/8% Senior Notes due 2019 at an issue price of 96.555%, resulting in gross proceeds of $289.7 million and net proceeds of $281.0 million after deducting transaction fees. EarthLink also entered into a $150 million revolving credit facility and terminated its $30 million revolving credit facility. No amounts were outstanding under the revolving credit facility as of June 30, 2011.

Business Outlook

The following statements are forward-looking, and actual results may differ materially.  See comments under “Cautionary Information Regarding Forward-Looking Statements” below.  EarthLink undertakes no obligation to update these statements.

Today EarthLink announced updated guidance that raises and narrows its estimates for the full year 2011. Management now expects Adjusted EBITDA of $315 million to $320 million; free cash flow of $200 million to $215 million; capital expenditures of $105 million to $115 million; and net income of $24 million to $28 million for the full year 2011.

Non-GAAP Measures

Adjusted EBITDA is defined as net income before interest expense and other, net, income taxes, depreciation and amortization, stock-based compensation expense, gain (loss) on investments, net, impairment of goodwill and intangible assets, and restructuring and acquisition-related costs.  Free cash flow is defined as net income before interest expense and other, net, income

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taxes, depreciation and amortization, stock-based compensation expense,  gain (loss) on investments, net, impairment of goodwill and intangible assets, and restructuring and acquisition-related costs, less cash used for purchases of property and equipment and purchases of subscriber bases.

Adjusted EBITDA and free cash flow are non-GAAP financial performance measures.  They should not be considered in isolation or as an alternative to measures determined in accordance with U.S. generally accepted accounting principles.  Please refer to the Consolidated Financial Highlights for a reconciliation of these non-GAAP financial performance measures to the most comparable measures reported in accordance with U.S. generally accepted accounting principles and Footnote 3 of the Consolidated Financial Highlights for a discussion of the presentation, comparability and use of such financial performance measures.

Conference Call for Analysts and Investors

Conference Call Details

Thursday, July 28, 2011, at 8:30 a.m. ET hosted by EarthLink’s Chairman and Chief Executive Officer Rolla P. Huff, President and Chief Operating Officer Joseph M. Wetzel, and Chief Financial Officer Bradley A. Ferguson.

Participants reference the EarthLink call and dial in 10 minutes prior to scheduled start time.

Webcast

A live Webcast of the conference call will be available at:  http://ir.earthlink.net/index.cfm

Replay

Replay available from 11:30 a.m. ET on July 28 through midnight on August 4, 2011.

To access the replay, dial 855-859-2056 or 404-537-3406. The confirmation code 82644801.

The Webcast will be archived on the company’s website at: http://ir.earthlink.net/events.cfm

About EarthLink

EarthLink, Inc (NASDAQ: ELNK) is a leading provider of Internet Protocol (IP) infrastructure and services to medium-sized and large businesses, enterprise customers, and over 1.6 million customer relationships across the United States. The company has provided Internet access and communications services for decades and has earned an award-winning reputation for both outstanding customer service and product innovation. Their EarthLink Business™ division provides a full complement of voice, data, mobile, cloud hosting and equipment services over a 28,000 mile fiber network and MPLS-based services nationwide. EarthLink Consumer is a leading Internet Service Provider connecting people to the power and possibilities of the Internet. For more information, visit EarthLink’s website www.earthlink.net

Cautionary Information Regarding Forward-Looking Statements

This press release includes “forward-looking” statements (rather than historical facts) that are subject to risks and uncertainties that could cause actual results to differ materially from those described. Although we believe that the expectations expressed in these forward-looking statements are reasonable, we cannot promise that our expectations will turn out to be correct. Our actual results could be materially different from and worse than our expectations. With respect to such forward-looking statements, we seek the protections afforded by the Private Securities Litigation Reform Act of 1995. These risks include (1) that we may not be able to execute our business strategy to

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transition to a leading IP infrastructure and managed services provider, which could adversely impact our results of operations and cash flows; (2) that we may be unsuccessful in making and integrating acquisitions into our business, which could result in operating difficulties, losses and other adverse consequences; (3) that the continuing effects of adverse economic conditions could harm our business; (4) that if we do not continue to innovate and provide products and services that are useful to individual subscribers and business customers, we may not remain competitive, and our revenues and operating results could suffer; (5) that our failure to implement cost reduction initiatives will adversely affect our results of operations; (6) that we will require a significant amount of cash, which may not be available to us, to service our debt and fund our other liquidity needs; (7) that we face significant competition in the Internet industry that could reduce our profitability; (8) that our consumer business is dependent on the availability of third-party network service providers; (9) that the continued decline of our consumer access subscribers, combined with the change in mix of our consumer access base from narrowband to broadband, will adversely affect our results of operations; (10) that our commercial and alliance arrangements may not be renewed or may not generate expected benefits, which could adversely affect our results of operations; (11) that privacy concerns relating to our business could damage our reputation and deter current and potential users from using our services; (12) that changes in technology in the Internet access industry could cause a decline in our business; (13) that we face significant competition in the communications industry that could reduce our profitability; (14) that decisions by the Federal Communications Commission relieving ILECs of certain regulatory requirements, and possible further deregulation in the future, may restrict our ability to provide services and may increase the costs we incur to provide these services; (15) that our wholesale services, including our broadband transport services, will be adversely affected by pricing pressure, network overcapacity, service cancellations and other factors; (16) that our operating performance will suffer if we are not offered competitive rates for the access services we need to provide our long distance services; (17) that we may experience reductions in switched access and reciprocal compensation revenue; (18) that our inability to maintain our network infrastructure, portions of which we do not own, could adversely affect our operating results; (19) that if we are unable to interconnect with AT&T, Verizon and other incumbent carriers on acceptable terms, our ability to offer competitively priced local telephone services will be adversely affected; (20) that we may not be able to compete effectively if we are unable to install additional network equipment or convert our network to more advanced technology; (21) that failure to obtain and maintain necessary permits and rights-of-way could interfere with our network infrastructure and operations; (22) that we may be unable to retain sufficient qualified personnel, and the loss of any of our key executive officers could adversely affect us; (23) that interruption or failure of our network and information systems and other technologies could impair our ability to provide our services, which could damage our reputation and harm our operating results; (24) that our business depends on effective business support systems and processes; (25) that government regulations could adversely affect our business or force us to change our business practices; (26) that our business may suffer if third parties used for customer service and technical support and certain billing services are unable to provide these services or terminate their relationships with us; (27) that we may not be able to protect our intellectual property; (28) that we may be accused of infringing upon the intellectual property rights of third parties, which is costly to defend and could limit our ability to use certain technologies in the future; (29) that if we, or other industry participants, are unable to successfully defend against legal actions, we could face substantial liabilities or suffer harm to our financial and operational prospects; (30) that we may be required to recognize additional impairment charges on our goodwill and intangible assets, which would adversely affect our results of operations and financial position; (31) that we may have to undertake further restructuring plans that would require additional charges, including incurring facility exit and restructuring charges; (32) that we may have exposure to greater than anticipated tax liabilities and the use of our net operating losses and certain other tax attributes could be limited in the future; (33) that we may reduce, or cease payment of, quarterly cash dividends; (34) that our stock price may be volatile; (35) that our indebtedness could adversely affect our financial health and limit our ability to react to changes in our industry; and (36) that provisions of our second restated certificate of incorporation, amended and restated bylaws and other elements of our capital structure could limit our share price and delay a change of management.  These risks and uncertainties, as well as other risks and uncertainties that could cause our actual results to differ significantly from management’s expectations, are not intended to represent a complete list of all risks and uncertainties inherent in our business, and should be read in conjunction with the more detailed cautionary statements and risk factors included in our Annual Report on Form 10-K for the year ended December 31, 2010.

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EARTHLINK, INC.

Unaudited Condensed Consolidated Statements Of Operations (1)

(in thousands, except per share data)

EARTHLINK, INC.

Reconciliation of Net Income to Adjusted EBITDA (3)

(in thousands)

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Reconciliation of Net Income to Free Cash Flow (3)

(in thousands)

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Reconciliation of Guidance Provided in Non-GAAP Measures (3)

(in millions)

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Supplemental Financial Data

EARTHLINK, INC.

Business Services Operating Metrics

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Consumer Services Operating Metrics

EARTHLINK, INC.

Supplemental Schedule of Segment Information (12)

(in thousands)

EARTHLINK, INC.

Footnotes to Consolidated Financial Highlights