The ZIP code system was introduced in the U.S. in 1963, and while they're most commonly known for helping with mail ...

A rural Connecticut town has only 600 addresses listed, but it six zip codes, making getting mail a headache. It may take federal legislation introduced in the U.S. Congress to change that.

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.

Overwhelmed by the growth of the suburbs and the constant creation of new addresses, the U.S. Postal Service has informed 8,574 customers in the 18103 ZIP code area that their mailing code will ...