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I keep regular tabs on where my accounts are accessed from, and sometimes search the locations of IPv4 addresses. I'm now seeing accounts / machines I keep track of being accessed from IPv6 addresses. My preferred site yields no results for IPv6 addresses.

How do I best geolocate or gain information on IPv6 addresses?

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Looking up an IP isn't geolocation. –  Tom Wijsman Jan 14 '13 at 15:42

2 Answers 2

There are several providers of GeoIP data (for both IPv4 and IPv6). For example:

However, since many IPv6 users today use IPv6-in-IPv4 tunnel services like Hurricane Electrics, GeoIP data for their IPs will be useless (since you cannot know the real IPv4 IP of the connecting user).

I've looked up GeoIP info on IPv6 users of one of my web sites several months ago: it was mostly useless. Only a handful of big ISPs world-wide are IPv6-enabled, and most users came from these ISPs, and the rest from tunnel services.

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I talked to MaxMind last month (Dec 2012) and they said they would launch a commercial production-grade IPv6 GeoIP service in 2013Q1. Let's see if they manage that :-) –  Sander Steffann Jan 14 '13 at 16:17

I've found two free sites serving GeoIP data on IPv6:

http://www.ip2location.com/demo

http://software77.net/geo-ip

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The Wayback Machine says that the first site, ip2location.com, used to have a downloadable database - web.archive.org/web/20111012112840/http://www.ip2location.com/… –  Fishbowler Jan 14 '13 at 16:01
    
I tested both using Google's IPv6 DNS server addresses - developers.google.com/speed/public-dns/docs/using –  Fishbowler Jan 14 '13 at 16:02

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