lan
Networking
Look up DNS records, calculate subnets, and inspect IP addresses. · 6 tools
NetworkingUses the network.DNS LookupQuery A, AAAA, MX, TXT, CNAME, and NS records for any domain.NetworkingUses the network.Reverse DNS LookupFind the hostname (PTR record) behind an IP address.NetworkingRuns locally in your browser.IP Address InspectorClassify an IP address and show its binary and integer forms.NetworkingRuns locally in your browser.IPv4 Subnet CalculatorCalculate network, broadcast, mask, and host range from CIDR.NetworkingRuns locally in your browser.IPv6 ExpanderExpand compressed IPv6 addresses to full form, and compress back.NetworkingRuns locally in your browser.Common Port ReferenceSearchable list of well-known TCP and UDP port assignments.