IP2Location is a IP address databases where you can find the latest IP to location associations. The complete IPv4 range is 4 294 967 296 addresses which is 32 bit. IP2Location contains 4 291 944 710 addresses which is a little less. However as much as 608 487 295 addresses come with no location set. It is because of: Above should not have location set as those are special IPv4 ranges. So valid commercial (and non-commercial also) use IPv4 addresses count should be somewhere near value of 3 683 457 415, which is all addresses minus addresses without location. DARPA