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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 | 312258 |
| Basic Format | 312-258 |
| NPA (Area Code) | 312 |
| NXX | 258 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | City | State |
|---|---|---|---|---|---|---|
| 312-258-XXXX | 9329 | ILLINOIS BELL TEL CO | CHICGOZN01 | AS | CHICAGO ZONE 01 | IL |
| Phone | Name | Address |
|---|---|---|
| 312-258-8188 | Law Office of Steven A. Sigmond, P.C. | |
| 312-258-0400 | Jimmy John's | 2 North Riverside Plaza Chicago 60606 US |
| 312-258-0925 | Venice Cafe | 500 West Monroe Street Chicago 60661 US |
| 312-258-1399 | Chicago Parthenon Hostel | 310 South Halsted Street Chicago 60661 US |
| 312-258-2150 | Chase | 30 South Wacker Drive Chicago 60606 US |
| 312-258-8789 | Zeus Restaurant | 806 West Jackson Boulevard Chicago 60607 US |
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Anonymous User from Chicago, Illinois
March 9, 2026 at 4:04 PM
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