CBS Colorado on MSN

New zip codes could improve Colorado towns' income, safety

Multiple towns across Colorado's Front Range are close to obtaining their own unique zip codes after the "Zip Code Bill" ...
NPR

The ZIP Code Turns 50 Today; Here Are 9 That Stand Out

Today marks the 50th anniversary of the Zone Improvement Plan, the network of ZIP codes we use for everything from mail delivery to credit card security. The U.S. Postal Service began using the ...