Network Working Group A. Cooper
Request for Comments: 1386 J. Postel
December 1992
The US Domain
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard. Distribution of this memo is
unlimited.
Table of Contents
1. Introduction ................................................ 2
1.1 The Internet Domain Name System......................... 2
1.2 Top Level Domains....................................... 3
1.3 The US Domain .......................................... 4
2. Naming Structure ............................................ 4
2.1 State Codes ............................................ 5
2.2 City Codes or Locality Names............................ 5
2.3 Examples of Names....................................... 5
3. Registration ................................................ 8
3.1 Requirements ........................................... 8
3.2 Direct Entries ......................................... 9
3.2.1 UUCP Hosts .......................................... 9
3.2.2 Non-IP Hosts ........................................ 10
3.3 Delegated Subdomains ................................... 12
3.3.1 Schools ............................................. 12
3.3.2 State Agencies ...................................... 14
3.3.3 Federal Agencies .................................... 14
3.3.4 Delegation Requirement............................... 14
3.3.5 Delegation Procedures ............................... 15
3.3.6 Subdomain Contacts................................... 18
4. Database Information......................................... 19
4.1 Name Servers ........................................... 19
4.2 Zone files ............................................. 20
4.3 Resource Records ....................................... 21
4.3.1 A Records ........................................... 22
4.3.2 CNAME Records ....................................... 22
4.3.3 MX Records .......................................... 22
4.3.4 HINFO Records ....................................... 23
4.3.5 PTR Records ......................................... 23
4.4 Wildcards .............................................. 23
5. References .................................................. 24
6. Security Considerations ..................................... 25
7. Author's Address ............................................ 25
Appendix-I: US Domain Names BNF................................. 26
Appendix-II: US Domain Questionnaire for Host Entry.............. 28
Cooper & Postel