I'm trying to understand a bit more about IP addresses and noticed something interesting. When I lived with a friend and used his WiFi, the IP address looked similar to the one I'm seeing now at my new place. Here are a few examples of IPs I've seen: 2600:387:1:919::9, 2600:387:1:811::46, and 2600:387:f:915::4. I'm curious if these are all linked to the same account or person, or if they come from different sources.
4 Answers
Your IP address comes from the router, which generates structured addresses for all connected devices. I’ll admit, the question is a bit perplexing but just know that what you're seeing is quite standard.
The IPs 2600:387:1:919::9 and 2600:387:1:811::46 are associated with AT&T customers in Allen, Texas, while the 2600:387:f:915::4 is from a customer in Springfield, Illinois. They're all AT&T addresses, which explains the similarities, but we can't say for sure if they're all the same person or not.
Since both addresses are AT&T's, it’s normal to see such patterns. They might even be from different locations, like one from Houston and another from Los Angeles, but if you both use AT&T, that's likely the answer. IPv6 space is so vast that many can share similar beginnings.
You're right that those are IPv6 addresses! More context would help determine specifics; for example, does the person in question own multiple devices, like computers or printers? If so, those could be the reason for the similar address structure.
Yes, he does have several devices! So does the matching prefix mean they're connecting through the same WiFi but with different devices?