IP & DNS
IP & DNS — 4 free browser-based developer tools including What Is My IP, IP Address Lookup and CIDR Calculator. Everything runs locally with no signup or uploads, so your data stays private and results are instant.
4 tools
What Is My IPFree online tool to instantly check your public IP address (IPv4/IPv6) along with approximate location, country, and ISP, to verify a VPN or diagnose networks.
IP Address LookupFree online IP address lookup tool that takes an IPv4 or IPv6 address and returns GeoIP details such as country, city, ISP, ASN, and timezone, plotting the location on a map
CIDR CalculatorFree online CIDR calculator that takes a block like 192.168.0.0/24 and computes the network address, IP range, usable host count, broadcast address and subnet mask for fast subnet planning.
IPv4 to IPv6 ConverterFree online tool that converts IPv4 addresses into IPv6 notation such as IPv4-mapped and 6to4 and converts IPv6 back to IPv4, showing both compressed and fully expanded forms