Internet Protocol (IP) addresses (under the current version 4) are 32-bit numbers
often expressed as 4 octets in "dotted decimal" notation (for example,
192.168.45.230).
If you need an IP address or block of addresses, please contact your Internet service provider (ISP).
Internet Service Providers (ISPs) should contact their upstream registry or their appropriate regional registry at one of the following addresses:
APNIC (Asia-Pacific Network Information Center)
ARIN (American Registry for Internet Numbers )
RIPE
NCC (Réseaux IP Européens)
IP ADDRESS ALLOCATIONS
Internet Protocol v4 Address Space
Network 24 - Cable Block (11 May 2001)
Internet Protocol v6:
Announcement of Worldwide Deployment of IPv6 (14 July 1999)
IPv6 Parameters (Parameters desribed for IPv6, including header types, action codes, etc.)
IPv6 Anycast Address Allocations
EMERGING RIRS
Criteria for Establishment of New Regional Internet Registries (ICP-2) (4 June 2001)
DOCUMENTATION