The familiar five-digit number was part of a nationwide effort to modernize the mail.

That used to be the ZIP code for Silver Cliff, Colorado, before the U.S. Postal Service removed it from use and forced the town to use neighboring Westcliffe’s ZIP code. “We lost our identity,” said ...

An early first anniversary present for some residents of Estero is being delivered, courtesy of the United States Postal Service. The Postal Service has approved using Estero as a mailing address, ...