3 ms·

That’s why MaxMind charges for more accurate data. It requires actual effort...

• aluminussoma 7y ago
  Yes, which is the whole point of my question: how is this data compiled? Just because it requires effort does not mean it can't be done in an open source way.
  • k-godwin 7y ago
    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.
    • NathanOsullivan 7y ago
      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.