🌐 Subnet Calculator

Calculate network addresses, broadcast addresses, usable host ranges, and more from any IPv4 address and CIDR notation.

/0 /8 /16 /24 /32

Common Subnet Reference

CIDR Subnet Mask Usable Hosts Common Use
/8 255.0.0.0 16,777,214 Class A Network
/16 255.255.0.0 65,534 Class B Network
/24 255.255.255.0 254 Small Office/Home
/25 255.255.255.128 126 Half /24
/26 255.255.255.192 62 Small Segment
/27 255.255.255.224 30 Small Team
/28 255.255.255.240 14 Small Subnet
/30 255.255.255.252 2 Point-to-Point Link
/32 255.255.255.255 1 Single Host