.us Domain Space

NTIA supervises the administration of the DNS country code top level domain for the United States (usTLD or .us domain) through a contract, the most recent of which was awarded to Neustar in 2019.

Table of Contents

Documents related to the 2019 contract
Documents related to the 2014 contract
Documents related to the 2007 contract
Documents related to the 2001 contract
Enhancement of .us name space

2019 Contract

.us Contract (June 28, 2019)
Neustar Technical proposal (November 21, 2018 -- incorporated into the contract by reference):
- Volume 1 (17 MB)
- Volume 2
- Volume 3
NTIA Statement (July 17, 2019)
Modification 001 – (August 26, 2019)
Modification 002 – (December 31, 2020)
Modification 003 – (August 29, 2021)

2014 Contract

.us Contract Part 1 (February 27, 2014)
.us Contract Part 2 (February 27, 2014)
Neustar Technical proposal (39 MB) (November 14, 2013 -- incorporated into the contract by reference)
NTIA Statement (March 4, 2014)
Modifications to the contract with Neustar
- Modification 0001 -- (May 20,2014)
- Modification 0002 -- (July 1, 2014)
- Modification 0003 -- (February 17, 2015)
- Modification 0004 -- (November 17, 2015)
- Modification 0005 -- (January 30, 2017)
- Modification 0006 -- (February 28, 2018)
- Modification 0007 -- (July 23, 2018)
- Modification 0008 -- (January 31, 2019)
.us Contract Solicitation
- Federal Register Notice — Country Code Top-Level Domain (ccTLD) for the United States; Policies and Requirements; Comments Request
- Comments received
- The original .us TLD Contract Solicitation Number: SB1335-13-RP-0086 (September 27, 2013)
- The revised .us TLD Contract Solicitation Number: SB1335-13-RP-0086 (November 1, 2013)
  On November 1, 2013, the Department of Commerce re-issued the Request for Proposal (RFP) SB1335-13-RP-0086 for a new .us TLD contract. The .us ccTLD serves as a home for American business, individuals, and localities for the benefit of the nation’s Internet community. The continued operation of the .us ccTLD is important to preserving the stability and security of the Internet domain name system (DNS) and maintaining an Internet that is open for economic growth and innovation

2007 Contract

.us Contract - (October 18, 2007)
NeuStar Proposal (incorporated into the contract by reference)
Modifications to the contract with NeuStar
- Modification 0001 -- (November 1, 2007)
- Modification 0002 -- (December 10, 2007)
- Modification 0003 -- (April 30, 2008)
- Modification 0004 -- (May 27, 2008)
- Modification 0005 -- (September 1, 2008)
- Modification 0006 – (June 16, 2009)
- Modification 0007 – (April 7, 2010)
- Modification 0008 – (October 14, 2010)
- Modification 0009 – (May 13, 2011)
- Modification 0010 – (August 19, 2011)
- Modification 0011 – (November 29, 2011)
- Modification 0012 – (June 27, 2012)
- Modification 0013 -- (August 30, 2012)
- Modification 0014 -- (August 16, 2013)
.us Contract Solicitation
- Request for Quote
  - Amendment 01
- Sources Sought

2001 Contract

.us Contract
Table of Contents for NeuStar Proposal
NeuStar Proposal (incorparated into the contract by reference)
Modifications to the contract with NeuStar
- Modification 001 - (February 13, 2002)
- Modification 002 - (June 14, 2002)
- Modification 003 - (August 17, 2002)
- Modification 004 - (September 6, 2002)
- Modification 005 - (December 23, 2002)
- Modification 006 - (January 13, 2003)
- Modification 007 - (February 14, 2003)
- Modification 008 - (May 1, 2003)
- Modification 009 - (August 19, 2003)
- Modification 010 - (September 30, 2003)
- Modification 011 - (December 31, 2003)
- Modification 012 - (March 31, 2004)
- Modification 013 - (June 1, 2004)
- Modification 014 - (September 21, 2004)
- Modification 015 - (October 12, 2005)
- Modification 016 - (October 25, 2005)
- Modification 017 - (August 24, 2006)
- Modification 018 - (October 20, 2006)
- Modification 019 - (March 16, 2007)
.us Contract Solicitation - (June 13, 2001)
- Request for Quote
- Amendment 1
- Amendment 2
- Amendment 3
- Notice of Intent to release RFQ for management and coordination of the .US TLD - (May 25, 2001)
Amendment 21 to the NSI Cooperative Agreement - (November 2, 2000)
Federal Register Notice - Requesting comments on draft statement of work regarding .US - (August 17, 2000)