IP & Routing
What's My IP
Show the public IPv4 or IPv6 address you are connecting from, with geolocation and ASN.
IP Lookup & Geolocation
Get geolocation, ISP, and ASN ownership for any IP address.
IP WHOIS Lookup
Find the network owner, ASN, and registry record for any IP.
ASN Lookup
Look up the AS number behind an IP, or details for any ASN.
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CIDR Calculator
Calculate network, broadcast, range, and host count for an IPv4 CIDR.
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Subnet Calculator
Split a CIDR block into smaller subnets at any prefix length.
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IP Address Converter
Convert IPv4 addresses to/from decimal, hex, and binary.
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IP Address Classifier — Public, Private, Reserved
Tell whether an IP is public, private (RFC 1918), loopback, link-local, or reserved.