Samiksha Jaiswal (Editor)

Internet Systems Consortium

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Area served  Worldwide
Founded  1994
Type of business  Network Engineering
Number of employees  20
Internet Systems Consortium httpslh6googleusercontentcom8RdKvphQ3wAAA
Focus  DNS, BIND, Internet, Kea
Location  Redwood City, California, U.S.
Key people  Jeff Osborn (President)
Formerly called  Internet Software Consortium
Founders  Paul Vixie, Rick Adams, Carl Malamud
Similar  Réseaux IP Européens Network, Linux Professional Institute, Asia‑Pacific Network Informatio, CompTIA, American Registry for Internet N

Internet Systems Consortium, Inc., also known as ISC, is a Delaware-registered, 501(c)(3) corporation that supports the infrastructure of the universal, self-organizing Internet by developing and maintaining core production-quality software, protocols, and operations. ISC has developed several key Internet technologies that enable the global Internet, including: BIND, ISC DHCP and Kea. Other software projects no longer in active development include OpenReg, and ISC AFTR (an implementation of an IPv4/IPv6 transition protocol based on Dual-Stack Lite).


ISC operates one of the 13 global authoritative DNS root servers, F-root.

Over the years a number of additional software systems were operated under ISC (for example: INN and Lynx) to better support the Internet's infrastructure. ISC also expanded their operational activities to include Internet hosting facilities for other open-source projects such as NetBSD, XFree86,, secondary name-service (SNS) for more than 50 top-level domains, and a DNS OARC (Operations, Analysis and Research Center) for monitoring and reporting of the Internet's DNS.

ISC is actively involved in community design process; it authors and participates in the development of the IETF standards, including the production of managed open-source software used as a reference implementation of the DNS.


Originally the company was founded as the Internet Software Consortium, Inc. The founders included Paul Vixie, Rick Adams and Carl Malamud. The intention of this corporation was to be to continue the development of BIND software. The founders believed that it was necessary for BIND's maintenance and development be managed and funded by an independent organization. ISC was designated as a root name server operator by IANA, originally as NS.ISC.ORG and later as F.ROOT-SERVERS.NET.

In January 2004, ISC reorganized under the new name Internet Systems Consortium, Inc.

In July 2013, ISC spun off the Security Business Unit to Farsight Security, Inc. a new company started by ISC founder Paul Vixie.

Open Source

ISC develops and maintains open source networking software, including BIND and two DHCP implementations, ISC DHCP and Kea. ISC also distributes INN and several older, unmaintained projects. Some aspects of its software have, in the past, been developed by developers that are commercially employed by Nominum.

ISC license

ISC developed and uses the ISC license which is functionally similar to the simplified BSD and MIT licenses. The ISC license is OpenBSD's preferred license for new code.

DNS root server

ISC operates the DNS "F" root server, the first such server to be distributed using anycast. In 2007 it was announced that ISC and ICANN would sign an agreement regarding the operation of F, the first such agreement made between ICANN and a root-server operator.

Usenet moderators list

ISC maintains and publishes (on the central Usenet moderators list and relays for moderated groups so individual server operators don't have to track moderator changes.

Internet Domain Survey

The Internet Domain Survey searches the Domain Name System (DNS) to discover every Internet host. The survey began when only a few hundred hosts were Internet linked. The earliest published reports dated 1993 were performed by Network Wizards owner Mark K. Lottor. The Internet host count was 1,313,000 in January 1993 and 1,062,660,523 in the latest January 2017 survey.

ISC is the current sponsor and publisher with technical operations subcontracted to Network Wizards.


In 2017, ISC joined the Market for zero-day exploits. They sell the early notification of critical security vulnerabilities, before the vulnerability is made public. Now, intelligence agencies and cyber criminals can buy vulnerabilities without accessing darknet.


Internet Systems Consortium Wikipedia