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Usually what happens is a carrier or post master from the office where the package is sent will correct the zip code by looking at the address and even reach out to that particular post office to ensure the package is delivered to the correct address.

The current postal codes in the United States range from 00001 ? 99950.

So what do the extra numbers mean? These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level. It could represent a handful of houses on one side of a street, or even a single building that receives a high volume of mail.

Call 1-800-ASK-USPS (1-800-275-8777) or TTY: 1-800-877-8339. Speak to the station manager (postmaster) at a local post office.

A ZIP Code is a 5-digit number that specifies an individual destination post office or mail delivery area. ZIP Codes determine the destination of letters for final sorting and delivery. Each ZIP Code designates a collection of delivery routes used by mail carriers and areas serviced by the USPS.

Almost 25% of all mailpieces have something wrong with the address -- for instance, a missing apartment number or a wrong ZIP Code. Can some of those mailpieces get delivered, in spite of the incorrect address? Yes. But it costs the Postal Service time and money to do that.

On the other hand, there should be no issue if the postage charge is the same, and you can drop off the package at a different zip code location. You may also be interested in: Shipping with USPS.