Re:Show HN: Tiny, fast, and free API to geolocate IP addresses
by k-godwin on Monday December 09, 2019 @01:18PM
(#21744917)
1) Agreements with ISPs [most accurate]
2) IP Spidering via traceroutes / RIPE/etc data.
3) Agreements with third parties that have IP/Address mapping due to data supplied from users. [least accurate]
That'd be my guess anyway.
Re:Show HN: Tiny, fast, and free API to geolocate IP addresses
by NathanOsullivan on Tuesday December 10, 2019 @04:18PM
(#21756969)
They also have a form on their site to submit corrections. Maxmind's db is so prevalent now, I suspect (indirect) users submit all the info they need nowadays.
Just because it requires effort does not mean it can't be done in an open source way.