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IP Ranges Reference

Local processing
Reference guide for private, reserved, and special-use IP address ranges
All Categories
17 ranges
CIDRCategoryDescriptionRFCAddresses in block
10.0.0.0/8
PrivatePrivate-Use NetworkRFC 191816,777,216
172.16.0.0/12
PrivatePrivate-Use NetworkRFC 19181,048,576
192.168.0.0/16
PrivatePrivate-Use NetworkRFC 191865,536
127.0.0.0/8
LoopbackLoopback (localhost)RFC 112216,777,216
169.254.0.0/16
Link-LocalLink-Local (APIPA)RFC 392765,536
100.64.0.0/10
Carrier-Grade NATCarrier-Grade NAT (Shared Address Space)RFC 65984,194,304
224.0.0.0/4
MulticastMulticastRFC 5771268,435,456
0.0.0.0/8
ReservedCurrent Network (This Host)RFC 112216,777,216
240.0.0.0/4
ReservedReserved (Class E)RFC 1112268,435,456
255.255.255.255/32
SpecialLimited BroadcastRFC 9191
192.0.2.0/24
DocumentationTEST-NET-1 (Documentation)RFC 5737256
198.51.100.0/24
DocumentationTEST-NET-2 (Documentation)RFC 5737256
203.0.113.0/24
DocumentationTEST-NET-3 (Documentation)RFC 5737256
198.18.0.0/15
SpecialBenchmark TestingRFC 2544131,072
192.0.0.0/24
ReservedIETF Protocol AssignmentsRFC 6890256
192.88.99.0/24
Special6to4 Relay Anycast (deprecated)RFC 7526256
192.31.196.0/24
SpecialAS112-v4RFC 7535256
Private Ranges
10.0.0.0/8 — 16,777,216 addresses
172.16.0.0/12 — 1,048,576 addresses
192.168.0.0/16 — 65,536 addresses
Documentation Ranges
192.0.2.0/24 — TEST-NET-1
198.51.100.0/24 — TEST-NET-2
203.0.113.0/24 — TEST-NET-3
2001:db8::/32 — IPv6 documentation
Special Addresses
127.0.0.1 — localhost (IPv4)
::1 — localhost (IPv6)
0.0.0.0 — wildcard bind address
255.255.255.255 — broadcast
Cloud Provider Range Sources
Cloud range feeds change independently of this local reference. These links open provider sources; the page does not fetch or validate their current contents.