You are reviewing the Area Code (NPA/NXX) report for 312-221. Did you mean to search the SMS short code 312221?
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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 | 312221 |
| Basic Format | 312-221 |
| NPA (Area Code) | 312 |
| NXX | 221 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|---|
| 312-221-0XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-1XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-2XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-3XXX | 5562 | METROPCS, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-4XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-5XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-6XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-7XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-8XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 07/05/2011 | CHICAGO ZONE 01 | IL | MW | 08/09/2011 |
| 312-221-9XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/20/2011 | CHICAGO ZONE 01 | IL | MW | 08/08/2011 |
| 312-221-XXXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 06/17/2011 | CHICAGO ZONE 01 | IL |
| Phone | Name | Address |
|---|---|---|
| 312-221-3987 | Macklin's Preferred Services LLC |
Reports
Anonymous User from Portland, Oregon
September 30, 2025 at 3:56 PM
Anonymous User from Portland, Oregon
September 30, 2025 at 3:34 PM
Anonymous User from , MN
August 16, 2023 at 6:24 PM
Anonymous User from Columbus, Georgia
January 24, 2023 at 6:00 PM
Anonymous User from Chicago, Illinois
July 25, 2022 at 5:52 PM
Anonymous User from South Holland, Illinois
June 6, 2022 at 12:14 PM
Anonymous User from , NY
February 25, 2015 at 3:35 AM