Pin code 306303
What 306303 tells you
The first digit, 3, is the postal zone. The first two digits, 30, are the postal circle. The first three, 306, are the sorting district, and 303 identifies the delivery office.
The first digit, 3, is the postal zone. The first two digits, 30, are the postal circle. The first three, 306, are the sorting district, and 303 identifies the delivery office.