Pin code 311023
What 311023 tells you
The first digit, 3, is the postal zone. The first two digits, 31, are the postal circle. The first three, 311, are the sorting district, and 023 identifies the delivery office.
The first digit, 3, is the postal zone. The first two digits, 31, are the postal circle. The first three, 311, are the sorting district, and 023 identifies the delivery office.