WHOIS, DNS, IP analysis, subnet math, and transfer time calculators — for network admins and developers.
Look up domain registration, registrar, expiry, and nameservers via public WHOIS services.
Calculate network, broadcast, mask, and usable hosts from CIDR with VLSM splits.
Find your public IP and classify any IPv4 or IPv6 address.
Query A, AAAA, MX, CNAME, TXT, NS, and SOA records via DNS-over-HTTPS.
Estimate transfer time, convert data units, and project monthly usage.
Estimate transfer time, convert data units, and project monthly usage.
Query A, AAAA, MX, CNAME, TXT, NS, and SOA records via DNS-over-HTTPS.
Find your public IP and classify any IPv4 or IPv6 address.
Calculate network, broadcast, mask, and usable hosts from CIDR with VLSM splits.
Look up domain registration, registrar, expiry, and nameservers via public WHOIS services.