There is also another type of postal code, the ZIP + 4 code. According to unitedstateszipcodes.org, the ZIP + 4 was established in 1983 and identifies an even more specific location within a ZIP code.

On July 1, 1963, the U.S. Post Office Department introduced the ZIP code program to get a handle on the heaping surplus of mail. Today, those five digits represent much more for American society.

Green officials say the current system, which splits the city between multiple postal codes, creates tax collection problems ...

Here’s how you can convert your postal code into a ZIP code: Check the postal card associated with your credit card’s billing address (for example, B1C 2D3).

In between the slugfests over Medi-Cal, taxes and immigration, the House of Representatives has voted to give Tehachapi a new ZIP code. Four other California communities also got new five-digit codes, ...