Subnet Calculator

Calculate IP subnet information from CIDR

IP Address

CIDR / Subnet Mask

Common Subnets

/24 (255.255.255.0): Most common for small networks (254 hosts)
/16 (255.255.0.0): Large networks (65,534 hosts)
/30 (255.255.255.252): Point-to-point links (2 hosts)
/8 (255.0.0.0): Class A networks (16M hosts)

Private IP Ranges

10.0.0.0/8: Class A private (10.0.0.0 - 10.255.255.255)
172.16.0.0/12: Class B private (172.16.0.0 - 172.31.255.255)
192.168.0.0/16: Class C private (192.168.0.0 - 192.168.255.255)