Free network tools
No signup. No paid API keys. Built for SEO-friendly, shareable checks — IP, DNS, email auth, TLS, and browser leaks.
What Is My IP
See your public IP, ISP, ASN, and location instantly.
what is my ip · my ip address
IP Lookup
Geolocation, ISP, ASN, reverse DNS, WHOIS, and trust score.
ip lookup · ip geolocation
Blacklist Check
Scan major DNSBL lists for an IP address.
ip blacklist check · dnsbl check
IP WHOIS / RDAP
IP ownership, ranges, and registry entities.
whois ip · rdap lookup
DNS Lookup
A, AAAA, MX, NS, TXT, SOA, and CAA records.
dns lookup · mx lookup
ASN Lookup
Autonomous system holder overview via RIPE Stat.
asn lookup · as number lookup
Reverse DNS Lookup
Resolve PTR records and check forward confirmation.
reverse dns lookup · ptr lookup
DNS Propagation Checker
Compare DNS answers across Google, Cloudflare, and Quad9.
dns propagation checker · dns propagation
Email Security (SPF / DMARC)
Audit SPF, DMARC, MX, MTA-STS, and BIMI TXT records.
spf checker · dmarc checker
SSL Certificate Checker
Issuer, SAN, expiry date, and days remaining.
ssl checker · ssl certificate checker
HTTP Header Checker
Fetch response headers and flag missing security headers.
http header check · security headers checker
Domain WHOIS / RDAP
Registrar events, nameservers, and status via RDAP.
whois lookup · domain whois
Browser & WebRTC Leak Test
See WebRTC candidates, user agent, language, and timezone.
webrtc leak test · ip leak test
Subnet Calculator
Network, broadcast, mask, and host range — fully offline.
subnet calculator · cidr calculator