- From: Bjoern Hoehrmann <derhoermi@gmx.net>
- Date: Thu, 13 Oct 2011 23:25:00 +0200
- To: "Steingruebl, Andy" <asteingruebl@paypal-inc.com>
- Cc: "public-privacy (W3C mailing list)" <public-privacy@w3.org>
* Steingruebl, Andy wrote: >Do you know off the top of your head how many people are uniquely >identifiable by just their zip+4? Anyone? I'm not asking in addition >to other data, just about zip+4 btw. There seem to be 125 million delivery points, 110 million households, 50 million ZIP+4 codes, and 30 million single person households. There are around 70 million people who do not use the Internet like toddlers. Then the upper bound should be somewhere broadly around 20% of the population and the real figure is probably a low single digit percentage. Estimates seem to be commercially available, but I couldn't find a proper study. If the number of total codes is right, the most simplistic estimate is 50 million codes over 310 people = ~16.13% (all but one code is used to uniquely identify someone and the rest has the remaining code). -- Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de Am Badedeich 7 · Telefon: +49(0)160/4415681 · http://www.bjoernsworld.de 25899 Dagebüll · PGP Pub. KeyID: 0xA4357E78 · http://www.websitedev.de/
Received on Thursday, 13 October 2011 21:25:28 UTC