Well, I’d say UPS has their tracking numbers covered for the time being.
The @UPS tracking uses 17 digits & one letter. Enough for 2.6 quintillion packages. That’s 370 million per person on Earth. — Neil deGrasse Tyson (@neiltyson) July 30, 2014
— Neil deGrasse Tyson (@neiltyson) July 30, 2014