Open IP intelligence,
built for engineers.
Look up any IP address, ASN, or domain. Get geolocation, BGP routing, WHOIS contacts, and abuse data — all from a free, fast, ad-free API.
Verified IP data, no paywall.
Everything is generated from authoritative sources. No proprietary geolocation guesses, no pay-to-unlock fields. Just real WHOIS, RIR, and BGP data.
Daily RIR Sync
Inetnums, autnums, organisations and abuse contacts pulled from all five RIRs every night.
BGP & Peering
Live announced prefixes, upstream/downstream relationships, and peer counts for every ASN.
Clean JSON API
Predictable, well-documented endpoints. No client SDK required — works with any HTTP client.
Free, Forever
No tiers, no surprise bills. 100 req/min anonymous, 500 req/min with a free API key.
IPv4 + IPv6
Native dual-stack across every endpoint and tool — no special flags needed.
Privacy-Respecting
No tracking pixels in API responses. Anonymous lookups stay anonymous.
Your connectivity
A live read of your IPv4 / IPv6 reachability and DNS preference.
Testing…
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Testing…
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DNS Preference
IPv6-only: —
Dual-stack: —
Networking tools, all in one place
Everything from DNS records to subnet maths to TLS certificate inspection — no install required.
DNS Checker
Look up DNS records for any domain
→SPF Checker
Validate SPF records
→MX Checker
Check mail server records
→DMARC Checker
Validate DMARC policy
→What's My IP
See your public IP info
→Subnet Calculator
Calculate IPv4/IPv6 subnets
→Blacklist Checker
Check IP against DNSBL lists
→Server Info
Detect website technology
→User Agent
Identify your browser info
→ASN Lookup
Look up Autonomous System info
→SSL Checker
Inspect SSL certificates
→Password Generator
Generate secure passwords
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