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Notes from the mapping table

Guides, deep dives and product news — written for developers who work with addresses, IPs and the messy geography behind them.

What an IP geolocation API can and can't tell you

What an IP geolocation API can and can't tell you

IP location data comes from routing records, not GPS. What an IP geolocation API answers reliably, where it goes vague, and the patterns that hold up in production.

Guides