Question: is po box the same as zip code

Answer: No, Street Addressing will have the same street address of the post office, plus a ``unit number'' that matches the P.O. Box number. As an example, in El Centro, California, the post office is located at 1598 Main Street. Therefore, for P.O. Box 9975 (fictitious), the Street Addressing would be: 1598 Main Street Unit 9975, El Centro, CA. Nationally, the first five digits of the zip code may or may not be the same as the P.O. Box address, and the last four digits (Zip + 4) are virtually always different. Except for a few of the largest post offices in the U.S., the 'Street Addressing' (not the P.O. Box address) nine digit Zip + 4 is the same for all boxes at a given location.