Network Calculators
IP lookup, DNS, subnet, ports
Essential tools for developers, sysadmins, and network engineers. Perform IP subnet calculations, CIDR notation lookups, DNS queries, WHOIS searches, port checks, and more. All tools run directly in your browser — no extensions, no installs, no data sent to third parties.
My IP Address
Find your public IP address, location, ISP, and connection info.
Subnet Calculator
Calculate subnet mask, network address, broadcast, and host range.
DNS Lookup
Look up DNS records (A, AAAA, MX, TXT, CNAME) for any domain.
Open Port Checker
Check if a port is open or closed on any host.
IP Address Converter
Convert IP addresses between decimal, binary, hex, and integer.
WHOIS Lookup
Look up domain registration info, expiry date and nameservers.