Check a domain. Debug a connection. Simplify your workflow.
Sixty focused tools, all in one place.
Measure reachability and latency over IPv4.
Measure reachability and latency over IPv6.
See your connection’s public IP address.
Inspect network hops to an IP or domain.
Look up the approximate location of an IP.
Inspect mail routing and authentication.
Check an address against DNS blocklists.
Convert an IP address to an integer.
Resolve reverse DNS for an IP address.
Find allocation and registration information.
Inspect registration details for IPv6.
Create an IPv4-mapped IPv6 representation.
Generate a random unique local IPv6 prefix.
Calculate an IPv6 network’s boundaries.
Represent an IPv6 range as CIDR blocks.
Shorten IPv6 addresses into canonical notation.
Expand all eight groups of an IPv6 address.
Calculate network ranges and host capacity.
Extract IPv4 from a mapped IPv6 address.
Check IPv6 DNS and connectivity signals.
Identify the network behind your connection.
Resolve a domain’s IPv4 and IPv6 addresses.
Local calculations stay in your browser. Network checks show their source and limitations.