The short answer
IP geolocation maps an IP address to a place. Databases start from where the regional internet registries say an address block was allocated, then refine it with ISP data, network measurements and user reports.
How accurate is it?
Country-level results are right the vast majority of the time. City-level results are much less reliable, especially for mobile IPs, which can appear hundreds of kilometres from the phone. Different databases often disagree, so a proxy one site sees as "Chicago" another may place in "Illinois, unknown city".

Also known as
GeoIP, IP location lookup, IP-to-location.
Learn more
- Geo-targeted proxies
- What is geo-targeting?
- What is a proxy IP?
- What is an ASN?
- The regional internet registries
- IANA number resources
- AFRINIC, the African registry
- CAIDA internet measurement research
Editorial note: Proxy providers change their pools, features and prices often, so treat any figures here as typical ranges at the time of writing and confirm current terms with the provider before you buy.