You're identified by dozens of numbers. Your phone number, your driver's license number, your social security number, your zip code, your license plate, your credit card numbers. I find these numbers fascinating. Who distributes them? What can they be used for? How can you use them? How are they issued?
I originally started this site to hold my information on Wisconsin Driver's License numbers. I'm now attempting to add more information, as I notice it. If you know of any good information, please let me know.
DISCLAIMER: This is hobby of mine. The information I provide may be wrong! More details on my disclaimer.
This web page has been mentioned elsewhere, I'm so flattered.