You are reviewing the Area Code (NPA/NXX) report for 312-309. Did you mean to search the SMS short code 312309?
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The area code you entered, 312, overlaps with the DSN network for the Continental United States and Puerto Rico under Northern Command (NORTHCOM), though it could also be part of standard civilian phone numbers.
| Raw Number | 312309 |
| Basic Format | 312-309 |
| NPA (Area Code) | 312 |
| NXX | 309 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | City | State |
|---|---|---|---|---|---|---|
| 312-309-XXXX | 9329 | ILLINOIS BELL TEL CO | CHICGOZN01 | AS | CHICAGO ZONE 01 | IL |
Reports
Anonymous User from , IL
April 8, 2026 at 12:57 PM
Anonymous User from Perryopolis, Pennsylvania
August 16, 2025 at 5:00 PM
Anonymous User from Chicago, Illinois
May 29, 2025 at 3:24 PM
Anonymous User from Libertyville, Illinois
March 6, 2025 at 2:13 PM
Anonymous User from , IL
January 13, 2025 at 8:45 PM
Anonymous User from Chicago, Illinois
December 4, 2024 at 1:04 PM
Anonymous User from Chicago, Illinois
July 20, 2024 at 10:39 AM
Anonymous User from Chicago, Illinois
April 27, 2024 at 12:54 PM
Anonymous User from Glenview, Illinois
October 7, 2022 at 3:58 AM