A RIR is a nonprofit organization that allocates IPv4, IPv6 and ASN (Autonomous System Numbers). The answer is simple, from one or more RIRs (Regional Internet Registry). I hear you are asking “Where does one of the API get geolocation of an IP address from?”. When you are googling for " What is my IP address?", It probably takes you to a site which is using that kind of API. There are many free services available on the internet as well as commercial ones which provide some sort of an API (Application Programing Interface) to their clients. With help of IP geolocation, we can find geographic location of an IP address. Instead, that expression will even be true for packets where either source or destination IP address equals 1.2. Especially when we do network forensic analysis which aims to detect attack patterns and identify attackers. Unfortunately, this does not do the expected. There are times when we need to trace an IP address back to its origin (Country, City, AS Number etc.). Introduction to tracing IP Address with Wireshark
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