One endpoint. Every IP question answered.

What you get in one call

curl https://api.ip-atlas.io/json/8.8.8.8
{
  "ip": "8.8.8.8",
  "country": "US",
  "country_name": "United States",
  "registry": "arin",
  "asn": 15169,
  "org": "GOOGLE",
  "is_datacenter": true,
  "is_vpn": false
}

The same endpoint accepts IPv6 and a second, authenticated variant (GET /json, no IP in path) returns data about the caller's own source address — picked from CF-Connecting-IP, X-Real-IP, or X-Forwarded-For.

Why not build this yourself?

• Pulling 5 × RIR daily delegation files, reconciling them into an authoritative IPv4 prefix table: ~4 hours/week ongoing.
• Keeping a curated list of datacenter and VPN ranges (~50 providers) accurate: another ~4 hours/week, forever.
• Serving lookups in <20 ms: requires a sorted prefix array in memory, atomic reload on refresh, and a tuned Go binary.
• We do this work once, for everyone, at $10 per 1,000,000 requests.