540 W Madison Chicago IL ZIP Codes
The blocks from 530 to 540, at W Madison ST in Chicago, Cook County - IL state have a unique zip code
530 - 540 W Madison Chicago IL, Chicago Area Code is 872/312/773 and Time Zone is Central (GMT -06:00).
Remember you have 2 kinds of blocks: even or odd. In this case you are matching Even and Odd numbers for this block
530 W Madison Chicago IL ZIP Code Plus 4
The U.S. Postal Service introduced an expanded Chicago ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", ZIP Plus 4 Chicago - IL, or "add ons". A ZIP Plus Four Code (ZIP+4) uses the basic Zip code plus four additional digits related to W Madison ST to identify a geographic segment within the five-digit delivery area, such as a the 530 to 540 W Madison Chicago IL street block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Illinois.
The postal code from addresses 530 to 540, applies to residential houses, business, buildings, and every property with Even and Odd numeration in this range.