U.S. Senator Charles Schumer, left, and Assemblyman James Tedisco hold a poster as the push to secure a zip code for Halfmoon is announced at Halfmoon Town Hall Wednesday, Feb. 18, 2015, in ...

The ZIP code rules are even more complicated where the address, state and code are placed, in terms of how they are written. The USPS says there has to be one space between the city and the state.

We ran quotes for homes on zip code boundaries in Wauwatosa, Brown Deer, and Milwaukee, and found differences as high as 20% between neighbors living less than 200 feet from each other.

Now it’s the mail.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 ...

Your billing ZIP code, sometimes called your credit card ZIP code, is “associated with the address where you receive your bill. Or, if you receive e-statements, with the address you've listed on ...