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1. www.unitedstateszipcodes.org › ilIllinois ZIP Codes List, Map, and Demographics

   www.unitedstateszipcodes.org › il

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   Illinois ZIP code map and Illinois ZIP code list. View all zip codes in IL or use the free zip code lookup.

   • Free ZIP code map, zip code lookup, and zip code list

     United States Zip Codes provides a free zip code map and...

2. worldpostalcode.com › united-states › illinoisIllinois Zip Codes: United States - World Postal Code

   worldpostalcode.com › united-states › illinois

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   ZIP codes for the US state Illinois. Use our interactive map, address lookup, or code list to find the correct 5-digit or 9-digit (ZIP+4) code for your postal mails destination.

3. tools.usps.com › go › ZipLookupAction!inputZIP Code™ Lookup | USPS

   tools.usps.com › go › ZipLookupAction!input

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   Enter a corporate or residential street address, city, and state to see a specific ZIP Code ™. Enter city and state to see all the ZIP Codes ™ for that city. Enter a ZIP Code ™ to see the cities it covers. A ZIP Code result does not confirm that a person or company is at that address.

4. www.ringflow.com › area-codes › illinoisIllinois Phone Codes: Area, Zip & Number Formats - ringflow.com

   www.ringflow.com › area-codes › illinois

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   Navigate Illinois communication landscape with ease. Find detailed listings of area codes, zip codes, and phone number structures for all regions across the state.

5. www.unitedstateszipcodes.orgFree ZIP code map, zip code lookup, and zip code list

   www.unitedstateszipcodes.org

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   United States Zip Codes provides a free zip code map and list of zip codes by state. Find zip codes by address, zip codes by city, or zip codes by state.

6. lookups.melissa.com › home › zipcityphoneZIP Code, City, Phone, Area Code Lookup Tool - Melissa

   lookups.melissa.com › home › zipcityphone

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   Use the ZIP Code, City, Phone, & Area Code lookup to search ZIP Codes, city names, phone numbers or area codes for information related to the given input. Displays the city name, state, county, population and more related to the input. Enter a 5 or 9-digit ZIP Code. Enter a city name. Enter a 10-digit phone number.

7. People also ask

   How do I find a postal code in Illinois?

   • Click the location on the map to find your needed postal code or choose the city in the US state Illinois zip code list. Also available, lookup by address feature at the top of the page. Just enter your address into the search bar to locate the postal code you need for your mail. ZIP codes for the US state Illinois.

   Illinois Zip Codes: United States - World Postal Code

   worldpostalcode.com/united-states/illinois/

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   How do I search a ZIP code?

   • Use the ZIP Code, City, Phone, & Area Code lookup to search ZIP Codes, city names, phone numbers or area codes for information related to the given input. Displays the city name, state, county, population and more related to the input. Enter a 5 or 9-digit ZIP Code. Enter a city name. Enter a 10-digit phone number. Enter a 3-digit area code.

   ZIP Code, City, Phone & Area Code | Melissa

   lookups.melissa.com/home/zipcityphone/

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   What is a US ZIP code?

   • US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently. ZIP codes near me are shown on the map above. Some still refer to ZIP codes as US postal codes. The term ZIP stands for Zone Improvement Plan.

   Free ZIP code map, zip code lookup, and zip code list

   www.unitedstateszipcodes.org/

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   How are zip codes assigned?

   • The assignment of cities to ZIP codes is more general. The city is usually the name of the main post office. For instance, almost all ZIP codes in St. Louis County in Missouri have a city of Saint Louis when they may be more accurately described as the name of a smaller city where they are located.

   Free ZIP code map, zip code lookup, and zip code list

   www.unitedstateszipcodes.org/

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   What if I don't have the right ZIP code for my mail?

   • Not having the right zip code for your postal mail would mean your letters will not reach their destination. Click the location on the map to find your needed postal code or choose the city in the US state Illinois zip code list. Also available, lookup by address feature at the top of the page.

   Illinois Zip Codes: United States - World Postal Code

   worldpostalcode.com/united-states/illinois/

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   Does USPS use a city or a ZIP code?

   • For the purposes of our free zip code database by county downloads, we will commonly list either the most common region for the ZIP code or list multiple regions if several exist in the ZIP code. For cities, the assignment is somewhat more complicated. USPS does not always use the city in which the ZIP code is located.

   Free ZIP code map, zip code lookup, and zip code list

   www.unitedstateszipcodes.org/

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8. worldpostalcode.com › lookupZip/Postal Code Lookup by Address, City, State

   worldpostalcode.com › lookup

   Find any zip code (including ZIP+4 - full 9-digit US zip codes) or postal code in the world by using our simple lookup function. Enter the address, city, state, province, or country into the search field above to locate a mailing address or find a package’s origin.