Google map showing the approximate location of each of the F-root nodes, and whether it is IPv4-only or IPv4 and IPv6

F Root

ISC has operated F-Root, one of the world’s thirteen root name servers, since 1994. We also provide secondary DNS hosting for 50 ccTLDs around the world.

F-Root is distributed using “anycast” technology with 57 operational locations, answering an average 16,000 queries per second.

We welcome inquiries from sites interested in hosting and/or sponsoring a new F Root node.  Read our Network Operations Report for 2014.


These organizations are among those supporting ISC’s Open Source mission through their ISC open source support subscriptions.

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Last modified: July 29, 2015 at 1:07 pm