Subnet Calculator

Networking

Enter an IP/CIDR and get the network, broadcast, host range, usable count, mask and wildcard — with binary.

IPv4 address with CIDR prefix

Network address10.20.28.0

Broadcast address10.20.31.255

Usable host range10.20.28.1 – 10.20.31.254

Usable hosts1,022

Total addresses1,024

Subnet mask255.255.252.0

Wildcard mask0.0.3.255

CIDR/22

ClassClass A

ScopePrivate (RFC 1918)

Binary

address00001010.00010100.00011110.00101010

mask11111111.11111111.11111100.00000000

network00001010.00010100.00011100.00000000

Everything is computed in your browser — nothing is sent anywhere. /31 and /32 follow RFC 3021 / host-route conventions.

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