IP and network tools
Inspect a connection, look up one address or calculate a network boundary.
What is my IP?
See the address, ASN and country returned for a request from your browser.
GET https://api.ipquery.io/?format=jsonResult fields: ip, isp.asn, location.country.
Subnet and CIDR calculator
Normalize an IPv4 or IPv6 prefix and inspect its exact first, last and address count.
256 addresses · 8.8.8.0 to 8.8.8.255
IPv6 lookup
Look up an IPv6 network, validate the address and copy its compressed or expanded form.
IPv4-mapped addresses show their embedded IPv4 value.
Public DNS servers
Find provider-published resolver addresses, encrypted DNS endpoints and filtering profiles.
Each endpoint links to its network report and official provider references.
IP WHOIS lookup
Find the official RDAP registry and inspect available recorded registration and abuse contacts.
Registry links are selected using IANA’s published routing data.