USPS tracking numbers typically consist of 22 digits.
1. How many numbers is a USPS tracking number?
A USPS tracking number is typically 22 digits long.
2. Can a USPS tracking number be shorter or longer than 22 digits?
In some cases, a USPS tracking number may be shorter or longer than 22 digits, but the standard length is 22 digits.
3. What do the numbers in a USPS tracking number represent?
The first 4 digits of a USPS tracking number represent the service type, the next 9 digits are the unique identifier for the package, and the last 2 digits are the checksum.