Country IP database provides allocated IP raw data from Regional Internet Registries. Country IP blocks are then used in firewalls, ad serving systems, routing, mail systems, web sites and other automated systems where IP to country mapping is useful.
Geolocation is the real-world geographic location of an Internet connected computer, mobile device, or website visitor based on the Internet Protocol address, MAC address, hardware embedded article/production number, embedded software number (such as EXIF/IPTC/XMP or modern steganography), invoice, or other, perhaps self-disclosed, information. ... A Regional Internet Registry (RIR) is an organisation overseeing the allocation and registration of Internet number resources within a particular region of the world. ...
External links
IPDeny provides country IP blocks in CIDR format with free daily updates.
IPligence provides a free IP geolocation database with updates.
IP2country IP Address Geolocation database can help you identify visitor`s geographical location of IP address.