Illinois - Cook Zip Codes

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Illinois - Cook Sub Regions

What is PIN Code or Zip Code and why they are used?

PIN CODE is abbreviation for Postal Index Number, Pincode is a 6 digits combination code used for identifying unique post office used by India Post for the delivery of mails and goods. It is very difficult to process the mails or parcels on the basis of address, basically Postal Codes are used to speed up the routing process the goods and mails to right direction.

What is classification of PIN Code?

First character of PINCODE represent the Region in India
Second Character of PINCODE represent the Sub Region in India
Third Character of PINCODE represent the sorting District of India
Last 3 Characters of PINCODE represent the Post Office of India

What is a ZIP Code and how does it work?

The ZIP Code full form is Zone Improvement Plan. A ZIP Code guides the destination post office or delivery area to which a letter or parcel will be sent for safe delivery of goods or mails. USPS delivery areas routes are directed by ZIP Codes in which goods are delivered.

ZIP Codes are basically 5-digit numbers developed by the United States Postal Service to identify and represent individual post offices across the United States. Most of the Countries has their own Postal systems developed in their country such as India, Czech Republic, Italy, Brazil, Germany, Switzerland etc. The United States Postal Service (USPS) has segmented the country into 10 ZIP Code areas. Starting in the northeast, they are numbered 0-9.

How USPS assigns Zip Code?

After the first number in a ZIP Code is assigned, the USPS assigns the next two numbers according to a city. the USPS will assign the first ZIP Codes of main town and cities. After that, the ZIP Codes will proceed alphabetically.

The first three digits of a ZIP Code together usually indicate the sectional center facility to which that ZIP Code belongs. The fourth and fifth digits of the ZIP Code represent the area of the city or town.

For example, if a letter is received with a ZIP Code of 94127, the USPS can know that it's in California (9), it's in San Francisco county (41), and in the area of the Westwood Highlands (27).

Illinois - Cook Zipcodes(Postcodes)