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A comment on The Nightmare Letter: A Subject Access Request Under GDPR. Parent comment

Re:The Nightmare Letter: A Subject Access Request Under GDPR by alam2000 on Sunday March 18, 2018 @06:44AM (#16611290)
The IP address is like a temporary phone number. It could not pinpoint the person persistently but can be tracked down with the help of ISP.

Other information you can retrieve from IP address is geolocation information such as https://www.ip2location.com

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Re:The Nightmare Letter: A Subject Access Request Under GDPR by jimktrains2 on Sunday March 18, 2018 @07:19AM (#16611407)
It's not a phone number because it doesn't need to resolve back to anything in particular. With carrier grade nat for instance, it could be shared by many people. At best it's shared by a house.

With regards of tracking you with the help of the ISP, if you have someone with those resources, it's not you storing an IP address that's their biggest concern.

Geoinformation can also change daily. Figuring it out afterwards isn't reliable.

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