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OpenDNS, a Domain Name Service provider that helps users avoid ISP outages and block specific web domains, has raised an undisclosed amount of first-round funding from Sequoia Capital and Greylock Partners. Founded in 2006, the San Francisco-based service reported that it was handling 7 billion DNS queries a day, bringing in as much as $20,000 a day — that was a year ago. Today, it says it manages 15 billion queries.

In addition to its two primary functions, the company’s service corrects typos in URLs, automatically redirecting to the proper page, and blocks web sites that have been marked as dangerous or corrupted. It is mostly used on networks running in the home, schools (many schools block domains like Facebook.com) and businesses.

Previously, OpenDNS raised $2.5 million from Minor Ventures. The company pulls in some revenue via subscriptions but offers most of its functions for free. Instead, it supports itself through an advertising deal with Yahoo. It has reportedly been profitable for the last year and a half.


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