chances are very good that someone else has your the same ID number as you. there are only 387,420,489 possible combination for a nine digit number and there are an estimated 303,824,640 ppl in the US. There is Def some reusing going on! give it another 10 years and see how many people have your number!
Huh?
Lessee, since we are using the decimal system there are 10 possible numbers for each number place (zero
is a possibility in any position), and there are nine numbers, so the number of possible combinations of a 9 digit is 109 or 1 billion.
I know that there are certain number combinations that are invalid (like 000-00-0000) but there can't be 600 million invalid combos.
Not to mention that a Georgia plate with the same exact number as a Florida plate is STILL a different plate...not to mention most plates are alphanumeric and here in Floristupid, we use 7 character plates, not 9.
Umm, I was talking about SSNs.
For license plates (in NH) there are only 7 characters also and MC plates only have 5.
However since each character can be either a number
or a letter, that provides 35 possibilities for each (zeroes are changed to the letter "O" but the letter "L" is allowed)
So a seven character plate has 357 possibilities, or 64,339,296,875 unique possibilities and a 5 character plate has 355 or 52,521,875. I'm pretty sure that they don't need to reuse any currently active combinations.