Chicago is located in Illinois, United States, with 85 postal codes indexed, using area code 312, 773, 872. This page provides a complete postal code list and a random phone number generation tool based on real dialing rules.
Postal Codes Directory
The following postal codes are indexed for this geographical region.
| ZIP Code | District / Neighborhood |
|---|---|
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook | |
| Cook |
Random Local Phone Numbers
Mock phone numbers matching local formatting and dialing area codes. (312, 773, 872) — Illinois
Frequently Asked Questions
How many ZIP codes are registered for this city?
There are currently 85 unique postal codes indexed for this city. The registered list includes: 60601, 60602, 60603, 60604, 60605, 60606, 60607, 60608, 60609, 60610, 60611, 60612, 60613, 60614, 60615, 60616, 60617, 60618, 60619, 60620, 60621, 60622, 60623, 60624, 60625, 60626, 60628, 60629, 60630, 60631, 60632, 60633, 60634, 60636, 60637, 60638, 60639, 60640, 60641, 60643, 60644, 60645, 60646, 60647, 60649, 60651, 60652, 60653, 60654, 60655, 60656, 60657, 60659, 60660, 60661, 60663, 60664, 60665, 60667, 60668, 60669, 60670, 60671, 60672, 60673, 60674, 60675, 60677, 60678, 60679, 60680, 60681, 60683, 60684, 60685, 60687, 60688, 60690, 60691, 60693, 60694, 60696, 60697, 60699, 60701.
What is the local dialing format for this region?
Local phone numbers follow the dialing prefix rules. Numbers generated locally are 10 digits long and utilize regional area codes: 312, 773, 872.
Local Dialing: Within the same area, dial the standard subscriber number directly without country prefix.
International Dialing: To dial internationally, prepend the country dial code followed by the local area code and number.
Local Dialing: Within the same area, dial the standard subscriber number directly without country prefix.
International Dialing: To dial internationally, prepend the country dial code followed by the local area code and number.
Can these numbers receive real verification codes?
No. These generated numbers are mock telephone numbers designed exclusively for software testing, quality assurance verification, and compliance mock databases. They cannot receive SMS or standard voice calls.
What do the digits in these postal codes represent?
In the United States, the first three digits of a ZIP code typically refer to a specific sectional center facility (regional mail hub), while the last two digits represent the specific delivery area or post office within that zone.
How can I find the exact ZIP code for a specific street address?
You can browse the detailed neighborhood mapping table on our site, or visit the official postal authority website (such as USPS for the USA) and input the complete street, city, and state information to retrieve the exact code.
Does this city support both 5-digit and ZIP+4 codes?
Yes. This website displays the standard 5-digit base postal codes. For actual mailing, a hyphen followed by a 4-digit extension (e.g., 90001-1234) can be appended to identify specific street segments, buildings, or post office boxes.
Can the phone numbers generated here be used for real calls?
No. The numbers use real regional area codes, but the subscriber numbers are randomly generated mock sequences. They are intended for developers to test input validation and UI formatting in application workflows. They cannot make or receive actual calls.
How frequently is the postal database updated?
Our database is periodically synchronized with official postal releases (like the USPS directories) to ensure that base codes and local district mapping rules remain accurate and up-to-date.