IPv4 Subnet Calculator
Calculate network information, subnet masks, host ranges, and wildcard masks for network planning and ACL configuration.
About Subnet Calculations
- • Network Address: The first address in a subnet, used for identification
- • Broadcast Address: The last address in a subnet, used to reach all hosts
- • Usable Hosts: Total addresses minus network and broadcast addresses
- • Wildcard Mask: Used in ACLs and routing protocols (inverse of subnet mask)
- • CIDR Notation: /24 means 24 bits for network, 8 bits for hosts