Norfolk, Va. – Effective immediately, anyone sending mail to Navy mobile units must use a nine-digit ZIP code to ensure delivery, according to a message released by Secretary of the Navy Ray Mabus.

MECHANICSBURG, Pa. (NNS) -- Effective immediately, family, friends, and businesses sending mail to Navy mobile units must use a nine-digit ZIP code to ensure delivery, according to an ALNAV message ...

Q: Is there an easy way to convert nine-digit ZIP codes to five-digit ZIP codes in Excel? A: In the United States, ZIP codes come in two formats: five-digit and nine-digit. If you have an Excel ...

I would like to know the purpose of the nine digit U. S. Postal ZIP Code and what reasoning is used in assigning the numbers. It must be very confusing to postal clerks and mail delivery persons ...