Internet Assigned Numbers
+ Responsible for global, unique Internet
+ One of the oldest Internet institutions, its
role dates back to the 1970s
+ “IANA” now refers to a series of functions
performed to coordinate unique Internet
+ Today, ICANN performs the IANA functions
Primary IANA functions!
Root Zone Management !
(Top-level Domain Names)!
+ Domain Names allow Internet users to type
in “iana.org” instead of a series of numbers
+ ICANN’s IANA department operates and
maintains a number of key aspects of DNS
+ Root zone ﬁle change requests for ccTLDs
+ Each device connected to Internet has
unique identiﬁer called IP Address.
+ Large numbers of computers are grouped
into Autonomous Systems.
+ Large blocks of addresses allocated to
Regional Internet Registries (RIRs) for
+ ICANN facilitates protocol
registry management with
IETF and RFC Editor and
maintains the protocol
The Evolution of IANA!
+ IANA functions ﬁrst performed within academia
and funded through U.S. Government grants.
+ Internet community participated in process to
create the non-proﬁt ICANN.
+ In 1998, IANA functions transitioned from the
University of Southern California’s Information
Sciences Institute to ICANN.
+ Today ICANN performs IANA functions under
contract with the U.S. Department of Commerce.
In performing the IANA functions, ICANN implements
policies developed by Internet stakeholders including:
+ Internet Engineering Task Force (IETF) !
+ Internet Architecture Board (IAB)!
+ Regional Internet Registries !
+ Operators and managers of ccTLDs and gTLDs!
+ Internet user community!
To improve its operations,
ICANN’s IANA department is
actively involved in outreach
+ ICANN Forums!
+ Meetings and discussions with
TLD operators, RIRs and others!
+ Helpdesk at IETF meetings!
+ Find information about
IANA functions at