Network

Private IP Ranges Reference

Classify an IP address as private, loopback, link-local, multicast, or public. Browse all RFC-defined special-purpose ranges for IPv4 and IPv6 .

Classify an IP Address (optional)

IPv4 Special-Purpose Ranges

Range (CIDR)DescriptionRFCType
10.0.0.0/8Private network (Class A)RFC 1918private
172.16.0.0/12Private network (Class B)RFC 1918private
192.168.0.0/16Private network (Class C)RFC 1918private
127.0.0.0/8Loopback addressesRFC 5735loopback
169.254.0.0/16Link-local / APIPA (Auto-IP)RFC 3927link-local
224.0.0.0/4Multicast addressesRFC 5771multicast
240.0.0.0/4Reserved for future useRFC 1112reserved
192.0.2.0/24Documentation (TEST-NET-1)RFC 5737documentation
198.51.100.0/24Documentation (TEST-NET-2)RFC 5737documentation
203.0.113.0/24Documentation (TEST-NET-3)RFC 5737documentation
0.0.0.0/8This network (unspecified)RFC 1122reserved
100.64.0.0/10Shared address space (CGN)RFC 6598private
192.88.99.0/246to4 relay anycast (deprecated)RFC 7526reserved
198.18.0.0/15Benchmarking (BMWG)RFC 2544reserved
255.255.255.255/32Limited broadcastRFC 919reserved

IPv6 Special-Purpose Ranges

RangeDescriptionRFCType
::1/128Loopback addressRFC 4291loopback
::/128Unspecified addressRFC 4291reserved
fc00::/7Unique local addresses (ULA)RFC 4193private
fe80::/10Link-local addressesRFC 4291link-local
ff00::/8Multicast addressesRFC 4291multicast
2001:db8::/32DocumentationRFC 3849documentation
2002::/166to4 (deprecated)RFC 7526reserved
64:ff9b::/96IPv4/IPv6 translation (NAT64)RFC 6052reserved
100::/64Discard-only address blockRFC 6666reserved
2001::/32Teredo tunnelingRFC 4380reserved
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