Public IP shows strange characters and Facebook registers logged-in session to a different location

Posted by Stuart Kershaw on Super User See other posts from Super User or by Stuart Kershaw
Published on 2013-11-08T20:53:49Z Indexed on 2013/11/08 21:59 UTC
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networking

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ip

I'm encountering some IP strangeness today and hoping to find an explanation.

In short, I'm based in Seattle, WA with my ISP being Comcast. While browsing Facebook's account settings, I noticed that my active session was located to Mount Laurel, NJ.

At that point I ran a search in Google for 'my public IP', which returned an interesting result: a string of characters in the following format:

2601:8:b000:xxx:xxxx:xxxx:xxxx:xxxx

Normally, a search for my IP returns something like:

67.xxx.xx.xxx

A phone call to Comcast got me nowhere, but using Comcast's phone-menu debugging tools, I was able to send a 'refresh signal' to my modem. After that, the search for 'my public IP' yielded the expected result... for about 5 minutes, and then it returned to the new string of characters.

Does anyone know of an explanation for this?

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