Free Networking Tools

Calculate network details from any IPv4 or IPv6 CIDR notation - subnet mask, broadcast address, usable host range, and more.

Look up DNS records for any domain - A, AAAA, CNAME, MX, NS, and TXT records with a single query.

See your public IP address along with geolocation, ASN, organization, and network type details.

Find the owner, registry, country, and registration details for any autonomous system number.

Map any IPv4 or IPv6 address to its originating ASN, announced route, and organization.

Query PTR records to find the hostname associated with any IPv4 or IPv6 address.