IP to ISP Database

IP to ISP database is a crucial resource that allows mapping digital connections to their physical locations. This method relies on a vast repository of data which is cross-referenced to identify where an IP address originates from, often down to the city level. This information is collated from a variety of sources, most notably regional internet registries (RIPE, ARIN etc) who delegate their allocated address space to Local Internet Registries who then allocate it to organisations seeking to utilise them on the public internet. This information can also be mined from network infrastructure, typically via data from internet exchange points and routing information from ISPs themselves.

The final result is a table of values that are matched against an IP address, indicating the country in which it is located and the ISP providing the service. This information can then be used for a number of different purposes, ranging from statistical analysis to security checks.

Mapping Internet Providers: IP to ISP Database

Most IP to ISP databases are free to use and update every week. However, some are API-only and require a monthly fee to query. Others offer a free quota of queries that can be used within a certain period, which is ideal for prototyping projects or testing specific queries.

The accuracy of these databases varies, with some providers claiming up to 99% at the country and 95% at the city level. This is not surprising as IP addresses are dynamic, resulting in the location of devices connecting to them being influenced by factors such as device misconfiguration, ISP network routing, and VPN/Proxy connections along the way.