The additional four digits (e.g., 15658-XXXX) are used by the USPS to identify specific delivery segments like city blocks, apartment groups, or high-volume mail receivers. 3. International Postal Code
Depending on what you are looking for, this number likely refers to one of the following: 1. A Typo for Zip Code 56589 156589 zip
It is common for "1" to be accidentally added to the front of the five-digit code . The additional four digits (e