My IP
Detect your public IP address and basic information.
IP Lookup
Lookup geolocation data for any IP address.
IPv4 Subnet Calculator
Calculate network, broadcast, usable range, hosts and IP class.
IPv6 Subnet Calculator
Work with IPv6 prefixes and subnet sizes.
VLSM Helper
Simple VLSM: sort host requirements and show suggested blocks.
Subnet / CIDR Calculator
Quick IPv4 CIDR breakdown.
IPv4 Converter
Convert an IPv4 address between decimal, binary and hexadecimal.
Test Your Knowledge
Networking multiple-choice quiz: IP addressing, subnetting, and fundamentals.
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