You can't.
There can be 103 = 1000 codes.
There are 210 4 digit combinations and 5040 different 4 digit codes.
There is no 2-digit country code +25. It does not exist. With the exception of +20 (Egypt) and +27 (South Africa), all country codes beginning with +2 are 3-digit codes. There are several 3-digit country codes that begin with +25.
There are no ten digit zip codes. Maryland has many five digit zip codes and many many more nine digit zip+4 codes. There can be a unique nine digit zip+4 code for every mailbox in a post office building and for at least every block in a town or city!
If you include 0000, ten thousand unique four digit codes are possible.
Codes on a 1992 should be 2 digit in length.Codes on a 1992 should be 2 digit in length.
Codes on a 1992 should be 2 digit in length.Codes on a 1992 should be 2 digit in length.
When no fifth-digit subcategory codes are in that category
Five digit- four digit
1943
In Philadelphia, 74 five digit zip codes are there.
For a four-digit ID code, you would have 10x10x10x10, so 10000 different codes. With a five-digit and one letter ID code, you have 10x10x10x10x10x26 or 2,600,000 different codes. So there are 2,600,000-10,000 more, or 2,590,000 more codes.