.us Domain name availability is subject to the name reservation rules listed
below. The following domain name-types are unavailable for public registration:
Reserved Name Rules:
1. All domains of any length beginning with 18XX or 1-8XX or 8XX
where X is any number from 0 to 9 inclusive.
2. All domains beginning with NXX or 1NXX or 1-NXX followed by exactly seven numbers not including hyphens,where N is any number from 2 to 9 inclusive and X is any number from 0 to 9 inclusive.
3. All domains beginning with XXXXX where X is any number from 0 to 9 inclusive.
Example of reserved domains:
• 1800abc.us (rule #1)
• 812abc-def.us (rule #1)
• 1-805-999-9999.us (rule #1)
• 212-999-9999.us (rule #2)
• 19009998888.us (rule #2)
• 1-212—1-2-3-4-5-6-7–.us (rule #2)
• 20176.us (rule #3)
• 90210-Melrose.us (rule #3)
• a.us
• 1.us
• gb.us
• 22.us
• bq–2jkj34.us
Example of non-reserved domains:
• 18-00bar.us
• 1111.us
• yourname.us
• 1-212-5.us
• 1-212—1-2-3-4-5-6-7–abc.us
• 2222.us
The following strings have been reserved by ICANN:
• aso.us
• dnso.us
• icann.us
• internic.us
• pso.us
• afrinic.us
• apnic.us
• arin.us
• example.us
• gtld-servers.us
• iad.us
• iana.us
• iana-servers.us
• iesg.us
• ietf.us
• irtf.us
• istf.us
• lacnic.us
• latnic.us
• rfc-editor.us
• ripe.us
• root-servers.us
• aero.us
• arpa.us
• biz.us
• com.us
• coop.us
• edu.us
• gov.us
• info.us
• int.us
• mil.us
• museum.us
• name.us
• net.us
• org.us
• pro.us
• nic.us
• whois.us
• www.us