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Mission Critical Software

We’re the authors of the DNS open source software BIND, we’ve written over 60 RFCs, and we’re proud to be contributors to the Internet Engineering Task Force.



F-Root Operator

We’ve operated F-Root, one of the world’s thirteen root name servers, since 1994. We also provide secondary DNS hosting for 54 ccTLDs around the world.

Network Peering


Public Benefit

We’ve contributed more than $68,000,000 in software and engineering hours to the internet community, looking to build a faster, more secure and reliable Internet.


  • ISC concludes BIND 10 development with Release 1.2

    April 17, 2014

    Internet Systems Consortium (ISC) today announced the release of version 1.2 of its BIND 10 software, and with that release announced that ISC has concluded its development work on BIND 10 and will no longer be updating the source pool. BIND 10 release 1.2 consists of an...

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F-Root is distributed using “anycast” technology all around the world, with 54 operational locations, carrying 25% of the root name server traffic, and operating an average 16,000 queries per second.

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Is your software updated against a security vulnerability?

It is important to keep your software up-to-date against potential cyber attacks and vulnerabilities. View the latest security advisories for BIND and DHCP at ISC’s KnowledgeBase or Security Advisory page

Community Support

BIND  and DHCP are open source software. Community support is available on our two public mailing lists: bind-user and dhcp-user.  We also provide expert professional support for our enterprise users via You can reach our support team by filling out the form at

BIND security is critical to the Internet Infrastructure. If you think you may be seeing a potential security vulnerability in BIND (for example, a crash with REQUIRE, INSIST, or ASSERT failure), please report it immediately to and do not post it on the public mailing list.

To report a bug, please submit a Bug Report Form, or submit via email to and

If you wish to submit a feature request, email us at:


17 Apr – Projected date for BIND 10 1.2 release

23 Apr – Projected date for BIND 9.10.0 release

24 Apr – UKNOF 28 (Reading, United Kingdom)
Stephen Morris (Software Engineering) and Cathy Almond (Support) will be in attendance.

28–29 Apr – Introduction to DNS & BIND (Arlington, VA, USA)
Get acquainted with BIND – this 3-day workshop covers BIND basics and best practices, as well as touching upon the history of DNS and the Internet. This is a classroom-style course that combines lectures with hands-on labs.

30 Apr–02 May – DNSSEC Technical Workshop (Arlington, VA, USA)
Register for all workshops on the DNSCo training page.

All Day, 10 May, 2014 - 11 May, 2014

All Day, 12 May, 2014 - 16 May, 2014

All Day, 02 June, 2014 - 04 June, 2014

All Day, 22 June, 2014 - 26 June, 2014

All Day, 20 July, 2014 - 25 July, 2014

Sponsor Highlight

Cisco is the worldwide leader in networking that transforms how people connect, communicate and collaborate. Over the years, Cisco has donated a significant amount of equipment to help ISC build advanced network infrastructure to bring F-Root and Secondary Name Service to our Internet community.