- RFC 1518 — Classless Inter-Domain Routing (CIDR)
Describes the CIDR Address Assignment and Aggregation Strategy, including variable-length subnetting.
- RFC 1918 — Address Allocation for Private Internets
Describes the range of IPv4 addresses reserved for private use.
- RFC 3330 — Special-Use IPv4 Addresses
Describes the global and other specialized IPv4 address blocks that have been assigned by the Internet Assigned Numbers Authority (IANA).
