Run IP lookups locally. Zero latency.

When to use MMDB

• You run IP lookups on every request and 20 ms of network RTT is too much.
• You're in a VPC that can't reach the public internet from production.
• You need deterministic reads — your lookup should not depend on a third-party being up.
• You're post-processing billions of log lines offline and would rather not round-trip.

Availability

Read it from any language

// Node — @maxmind/geoip2-node
const reader = await Reader.open('./ipatlas-2026-04.mmdb');
const r = reader.city('8.8.8.8');

# Python — maxminddb
import maxminddb
with maxminddb.open_database('./ipatlas-2026-04.mmdb') as r:
    r.get('8.8.8.8')

// Go — github.com/oschwald/maxminddb-golang
db, _ := maxminddb.Open("./ipatlas-2026-04.mmdb")
var rec map[string]any
db.Lookup(net.ParseIP("8.8.8.8"), &rec)