IP & Subnet

Calculate a network range from an IP address and subnet mask, or look up the registration information for an IP address using WHOIS.

Subnet Calculator — Free, with /1–/32 CIDR Quick-Reference

Instantly calculate the network address, broadcast address,...

IP Address Lookup

Displays your global IP address along with HTTP request deta...

IP WHOIS Lookup

Look up WHOIS information for any IP address using the RDAP...