IANA Services


On 1 October 2016 the contract between the Internet Corporation for Assigned Names and Numbers (ICANN) and the United States Department of Commerce National Telecommunications and Information Administration (NTIA), to perform the Internet Assigned Numbers Authority (IANA) functions, officially expired.

The expiration of this contract established the commencement date of the Service Level Agreement (SLA) entered into between ICANN and the five Regional Internet Registries (RIRs) for the administration of the IANA Numbering Services, signed on 29 June 2016.

"The realization of the IANA stewardship transition is an important milestone in Internet coordination activities, and all members of the global multistakeholder community should be proud of their efforts in making this happen."
John Curran, ARIN President and CEO

IANA Services Review Committee

To provide ongoing oversight and accountability for the IANA Numbering Services administrator, the Internet Number Community proposal to the IANA Stewardship Coordination Group (ICG) called for the establishment of an IANA Numbering Services Review Committee, whose role is to ensure the Service Level Agreement (SLA) for the IANA Numbering Services is met by the IANA Numbering Services Operator. The committee was required as part of the Internet Number Community's proposal to replace US Government oversight of the IANA functions.

The review committee charter is available on the NRO website.

Three representatives from each Regional Internet Registry (RIR) community will serve on the committee. For ARIN, these roles will be filled by the two community-elected NRO Number Council members and one ARIN staff member who is appointed by the ARIN Board of Trustees will participate on the ARIN community's behalf.

ARIN representatives on the IANA Numbering Services Review Committee:

  • Louie Lee- NRO NC
  • Jason Schiller – NRO NC
  • Nate Davis – ARIN staff representative

IANA Stewardship Transition History

On 14 March 2014 the US government announced a plan transition oversight of the Internet Assigned Numbers Authority (IANA) functions contract from the National Telecommunications and Information Administration (NTIA) to the global multistakeholder community.  The current contract expires on 30 September 2015.  Historically managed by the Internet Corporation for Assigned Names and Numbers (ICANN), IANA functions are part of Internet infrastructure and include responsibility for allocating and maintaining the unique codes and numbering systems used in Internet technical standards.

IANA Stewardship Transition Coordination Group (ICG) Proposal – completed 29 October 2015

Mailing List Archives:

ARIN iana-transition@arin.net  archive.

NRO's ianaxfer@nro.net archive.

The IANA Functions

The IANA functions consist of the following responsibilities:

  • Coordination of the assignment of technical Internet protocol parameters through the Internet Engineering Task Force (IETF)
  • Administration of and coordination of Internet domain name system (DNS) root zone management
  • Allocation of Internet number resources to the Regional Internet Registries (RIRs)
  • Management of the .ARPA and .INT top-level domains (TLDs)

Principles for the Transition Proposal

The NTIA has communicated to ICANN that the transition proposal must have broad community support and address the following four principles:

  • Support and enhance the multistakeholder model;
  • Maintain the security, stability, and resiliency of the Internet DNS;
  • Meet the needs and expectation of the global customers and partners of the IANA services; and,
  • Maintain the openness of the Internet.

The ICANN Process

ICANN is responsible for spearheading the development of a proposal by the global multistakeholder community for the transition of the current role played by NTIA in the coordination of the Internet's domain name system (DNS) along with other key stakeholders. Visit the ICANN NTIA IANA functions' stewardship transition microsite

The ICG Process

Based on community discussions, ICANN established an IANA Stewardship Transition Coordination Group (ICG) to facilitate the transition process.  It consists of 27 individuals representing different 13 communities including the ALAC, ASO, ccNSO, GAC, GNSO, gTLD Registries, ICC/BASIS, IAB, IETF, ISOC, NRO, RSSAC, and SSAC.  Public comments on the  IANA Stewardship Transition Coordination Group (ICG) proposal to transition the stewardship of the IANA functions can be viewed on the ICG website.  The IANA Stewardship Transition Coordination Group (ICG) Proposal was completed on 29 October 2015.

 The ARIN Process

The ARIN community discussed the IANA Stewardship Transition planning process via an open public mailing list to develop a proposal to submit to the Number Resource Organization (NRO).  Each RIR likewise independently held regional consultations to bring to the NRO. Next, ARIN input was consolidated with input of the other four Regional Internet Registries to form a complete submission on behalf of the Number Resource Organization (NRO) to the ICG on 15 January 2015.

3/20/14 – ARIN and the evolution of the IANA Functions

10/1/14 – 10/10/14 – ARIN Consultation

10/9/14 – Discussion at ARIN 34

10/13/14 – 10/20/14 – Open community survey on the IANA Stewardship Transition – Community Survey Summary Report (pdf)

Opened 10/13/14 – ARIN iana-transition@arin.net mailing list to facilitate open community discussion in the region regarding the IANA Stewardship Transition planning process. Everyone is encouraged to subscribe and participate in this dialog.  The archive of iana-transition is also available.

11/21/14 –  ARIN draft proposal discussed on the iana-transition mailing list and then sent to the CRISP team

2/2/15 – Community slide deck – Stewardship and Accountability for Internet Identifiers – NANOG 63 Presentation (pdf)

The NRO Process

The NRO discussed the IANA Stewardship Transition planning process via an open public mailing list to develop a proposal to submit to the  IANA Stewardship Transition Coordination Group (ICG).  Visit the NRO website for background and details about the CRISP Team (including including recordings, minutes and agendas of all the CRISP Team teleconferences and a public archive of the internal CRISP team mailing list) and meet your three ARIN CRISP Team Representatives.

The Number Resource Organization (NRO) Oversight of the IANA Functions Page

Internet numbers community proposal slide deck (pdf)

IANA transition timeline/checklist

4/20/16 –  Service Level Agreement drafted by the five RIRs, to be signed by the RIRs and the IANA Functions Operator for provision of the IANA Numbering Services

10/16/14 – Consolidated RIR IANA Stewardship Proposal Team (CRISP Team)

10/16/14 – NRO mail list –The CRISP team will work through this public mailing list.  Interested parties are invited to subscribe.  Archive of ianaxfer is also available.

12/9/14 – Timeline of CRISP team meetings open for observation

12/19/14 – 1st Draft Proposal released 

1/8/15 – 2nd Draft Proposal released

1/15/15 – Final Proposal from the Internet Number Community submitted to the IANA Stewardship Coordination Group (ICG)

6/14/15 – 1st Draft Service Level Agreement (SLA) for the IANA Numbering Services Call for Comments

8/31/15 – 2nd Draft Service Level Agreement (SLA) for the IANA Numbering Services Call for Comments

11/30/15 – 3rd Draft Service Level Agreement (SLA) for the IANA Numbering Services Call for Comments

Resources and Additional Information

IANA Oversight Transition Q&A

ICANN mailing list archive for input on the process for IANA oversight transition plan development and Frequently Asked Questions about the Transition

NTIA Announcement of Intent to Transition Key Internet Domain Name Functions