Network Tools
IP address lookup, IPv4 validation, and CIDR/subnet calculators for network engineers.
network Difficulty: 2/5
What Is My IP Address?
See the public IP address your browser is connecting from. Nothing is stored, nothing is logged, and your IP is never sent to analytics.
network Difficulty: 2/5
IPv4 Address Validator
Validate an IPv4 address with precise error reasons: wrong segment count, out-of-range octets, or ambiguous leading zeros. Runs entirely in your browser.
network Difficulty: 3/5
CIDR Calculator
Enter a CIDR block such as 192.168.1.0/24 to get the network and broadcast addresses, masks, usable host range and host count — including correct /31 and /32 behaviour.
network Difficulty: 3/5
Subnet Calculator
Calculate subnet details from an IP address plus a mask or prefix. Shows network, broadcast, mask, wildcard, host range and host count, all client-side.