Dev Tools›Subnet Calculator

Subnet Calculator

IPv4 subnet math — enter a CIDR to get network, broadcast, host range, mask, and classification.

CIDR Notation
FieldValue
Enter a CIDR above to calculate
Examples
Address Range Reference
RangeDescriptionRFC
10.0.0.0/8Private — Class ARFC 1918
172.16.0.0/12Private — Class BRFC 1918
192.168.0.0/16Private — Class CRFC 1918
127.0.0.0/8LoopbackRFC 1122
169.254.0.0/16Link-local / APIPARFC 3927
100.64.0.0/10Shared address space (CGNAT)RFC 6598
192.0.2.0/24Documentation (TEST-NET-1)RFC 5737
198.51.100.0/24Documentation (TEST-NET-2)RFC 5737
203.0.113.0/24Documentation (TEST-NET-3)RFC 5737
224.0.0.0/4MulticastRFC 5771
240.0.0.0/4Reserved / ExperimentalRFC 1112
255.255.255.255/32Limited broadcastRFC 919