About WorldIP.io
A complete map of the IPv4 Internet — every address, every ASN, every organization.
Mission
WorldIP.io exists to make IPv4 address data accessible to everyone. We merge multiple authoritative data sources into a single, fast, searchable database covering all 4.3 billion IPv4 addresses.
Whether you're a network engineer investigating a routing issue, a security analyst tracing an IP, or just curious about who owns an address — we provide the answer in under a second, free, with no signup required.
Data sources
We combine three primary data sources to build our database:
- MaxMind GeoLite2 — IP-to-country, IP-to-city, and IP-to-ASN mappings. Updated weekly (published Tuesdays). Provides geolocation accuracy to the city level for most addresses.
- RIR delegation files — IANA and the five Regional Internet Registries (ARIN, RIPE NCC, APNIC, LACNIC, AfriNIC) publish daily statistics files showing which blocks are allocated to which organizations.
- Reverse DNS — Real-time PTR record lookups provide hostnames for IP addresses, useful for identifying servers and mail systems.
For full technical details, see our data sources and methodology page.
Update cadence
Our database refreshes automatically every Tuesday at 04:00 UTC, within hours of MaxMind's weekly data release. The refresh process downloads fresh CSV files, merges them into our database, rebuilds aggregate statistics, and invalidates caches — all in about 5 minutes with zero downtime.
Technical stack
WorldIP.io is built for speed and reliability:
- Served via Cloudflare edge (TLS, DDoS protection, global CDN)
- Full-page HTML caching with 7-day TTL and smart entity-level invalidation
- MariaDB with optimized indexes for sub-millisecond range lookups
- Sitemap with 370K+ URLs across 10 shards for comprehensive search engine coverage
Contact
Questions, corrections, or partnership inquiries? Send us a message.
For security issues, email [email protected].