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IPv4 Subnet Calculator
Enter an IP address and CIDR prefix to calculate subnet details instantly.
IP Address
CIDR Prefix
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/24 (254 hosts)
/25 (126 hosts)
/26 (62 hosts)
/27 (30 hosts)
/28 (14 hosts)
/16 (65534 hosts)
/8 (16M hosts)
Subnet Details
IP Binary Breakdown
Usable Host Range