Free network tool
IP Lookup
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Network tools
More network tools
Free, browser-based diagnostics. No sign-up required.
DNS Lookup
Query a domain's DNS records (A, AAAA, MX, TXT, NS, CNAME).
WHOIS Lookup
View a domain's registration details (owner, registrar, dates).
Port Check
Check whether common ports are open on a server.
Internet Speed Test
Measure your connection speed and latency.
Scanning a local network?
Browsers can't see devices on your LAN. IPscans+ for Windows discovers every device, port and service on your network.