Network tools
Website diagnostics only. There is no public JSON API, API key, or bulk programmatic access.
DNS lookup
Resolve A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records.
WHOIS / RDAP
Inspect public IP or domain registration records.
Reverse DNS
Look up the PTR hostname for an IPv4 or IPv6 address.
CIDR calculator
Compute network boundaries, masks, and address counts.
ASN lookup
See the holder and announced prefixes for an autonomous system.
IP leak test
Compare the HTTP exit IP with WebRTC-discovered addresses.
WebRTC leak test
Gather ICE candidates without requesting camera permission.