What Is My IP Address? See your public IP address instantly and learn what it means, where it comes from, and how websites detect it. IP Lookup Tool Run an IP lookup to see geolocation, ASN, ISP, timezone and regional data for any IPv4 or IPv6 address. IPv4 Subnet Calculator Calculate IPv4 ranges from a prefix or CIDR, browse subnet boundaries and inspect IP addresses inside each network. IPv6 Subnet Calculator Calculate IPv6 network boundaries from CIDR notation, browse child prefixes and inspect addresses in each range. ASN Lookup Find the ASN behind an IPv4 or IPv6 address and understand which network operator or hosting provider owns the route.