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Internet Systems Consortium, Inc., also known as ISC, is a Delaware-registered, 501(c)(3) public charity non-profit corporation which succeeded Internet Software Consortium, Inc., the original ISC.[1][2]

The ISC main office is at 950 Charter Street in Redwood City, California 94063.[3]



ISC was founded in 1994 as Internet Software Consortium, Inc. by Rick Adams, Carl Malamud and Paul Vixie with UUNET funding to develop and support a number of Internet software reference implementations. In January 2004 the original ISC's projects, assets and staff were transferred to Internet Systems Consortium, Inc., the current ISC.[1]

Nominum was founded in 1999 as a for-profit spin-off from ISC, and was a subcontractor for its software development, support, and consulting.


Software developed and maintained by ISC includes BIND, OpenReg, a DHCP implementation, INN, and an NTP implementation.[1] Some aspects of its software have, in the past, been developed by developers that are commercially employed by Nominum.[4]

ISC license

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

DNS root server

ISC operates the DNS "F" root server[1], 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[5].

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.[6]

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.[7] 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 541,677,360 in the latest January 2008 survey.[8]

ISC is the current sponsor and publisher with technical operations subcontracted to Network Wizards.[7]


  1. ^ a b c d "The History of ISC". Internet Systems Consortium. Retrieved 2007-10-23.  
  2. ^ Internal Revenue Service (2007-12-15). "501(c)(3) exemption letter" (PDF). Internet Systems Consortium. Retrieved 2009-04-11.  
  3. ^ "Contacting ISC". Internet Systems Consortium. Retrieved 2009-04-11.  
  4. ^ "Nominum Inc history". "David Conrad founded Nominum in 1999develop BIND9 and ISC DHCP3 for the Internet Software Consortium"  
  5. ^ "Milestone Agreement Reached Between ICANN, and F Root Server Operator, Internet Systems Consortium". ICANN. Retrieved 2008-01-06.  
  6. ^ Usenet Hierarchy FAQ Section 4
  7. ^ a b "ISC Internet Domain Survey". Internet Systems Consortium. Retrieved 2009-04-11.  
  8. ^ "Internet Domain Survey, January 2008". Internet Systems Consortium. Retrieved 2009-04-11.  

External links



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