Network Working Group A. Cooper Request for Comments: 1480 J. Postel Obsoletes: 1386 June 1993 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 ............................................ 8 2.2 Locality Names.......................................... 8 2.3 Schools ................................................ 10 2.4 State Agencies.......................................... 15 2.5 Federal Agencies ....................................... 15 2.6 Distributed National Institutes......................... 15 2.7 General Independent Entities............................ 16 2.8 Examples of Names....................................... 17 3. Registration ................................................ 20 3.1 Requirements ........................................... 20 3.2 Direct Entries ......................................... 21 3.2.1 IP-Hosts............................................. 21 3.2.2 Non-IP Hosts ........................................ 21 3.3 Delegated Subdomains ................................... 24 3.3.1 Delegation Requirement............................... 26 3.3.2 Delegation Procedures ............................... 28 3.3.3 Subdomain Contacts................................... 29 4. Database Information......................................... 30 4.1 Name Servers ........................................... 30 4.2 Zone files ............................................. 30 4.3 Resource Records ....................................... 31 4.3.1 "A" Records ......................................... 32 4.3.2 CNAME Records ....................................... 32 4.3.3 MX Records .......................................... 33 4.3.4 HINFO Records ....................................... 33 4.3.5 PTR Records ......................................... 33 4.4 Wildcards .............................................. 34 5. References .................................................. 35 Cooper & Postel