LookupThis

IP Tools.

Everything IP — lookup, convert, trace, and diagnose.

IP Lookup

Look up information about any IP address. Reverse DNS, version, and network details.

Reverse DNS Lookup

Find the hostname associated with an IP address. Verify reverse DNS records.

What Is My IP

Find your public IP address instantly. Shows IPv4, IPv6, and basic connection details.

IP Location Lookup

Find the geographic location of any IP address. City, region, country, and coordinates.

IP Blacklist Checker

Check if an IP address is listed in anti-spam blacklists. Scans 50+ DNSBL databases.

IP WHOIS Lookup

Check who owns an IP address. Find the organization, network range, and contact information.

IP to Decimal Converter

Convert an IP address to its decimal representation and back.

Website to IP Lookup

Find the IP address of any website or domain. Resolves A and AAAA records.

What Is My ISP

Find your Internet Service Provider. Shows ISP name, ASN, and connection details.

IPv4 to IPv6 Converter

Convert an IPv4 address to its IPv6 equivalent (IPv4-mapped IPv6 address).

IPv6 to IPv4 Converter

Extract the IPv4 address from an IPv4-mapped IPv6 address.

IPv6 Compression Tool

Compress a full IPv6 address to its shortest valid representation.

IPv6 Expand Tool

Expand a compressed IPv6 address to its full 128-bit representation.

IPv6 CIDR to Range

Convert an IPv6 CIDR notation to its first and last address range.

IPv6 Range to CIDR

Convert an IPv6 address range to CIDR notation.

IPv6 Compatibility Checker

Check if a domain supports IPv6. Verifies AAAA records and IPv6 connectivity.

IPv6 Address Generator

Generate random IPv6 addresses for testing, ULA (Unique Local Addresses), and link-local ranges.

Subnet Calculator

Calculate IP subnets. Network address, broadcast, host range, and CIDR notation for IPv4 and IPv6.

Ping Tool

Ping any IP address or domain from multiple global locations. Check latency and packet loss.

Traceroute

Trace the network path to any IP or domain. See every hop between you and the destination.