You are reviewing the Area Code (NPA/NXX) report for 312-866. Did you mean to search the SMS short code 312866?
Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.
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 | 312866 |
| Basic Format | 312-866 |
| NPA (Area Code) | 312 |
| NXX | 866 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|---|
| 312-866-0XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-1XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-2XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-3XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-4XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-5XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-6XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-7XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-8XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-9XXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/25/2014 | CHICAGO ZONE 01 | IL | MW | 10/24/2014 |
| 312-866-XXXX | 6529 | T-MOBILE USA, INC. | CHICGOZN01 | AS | 08/22/2014 | CHICAGO ZONE 01 | IL |
| Phone | Name | Address |
|---|---|---|
| 312-866-0795 | Arbor | 2545 West Diversey Avenue Chicago 60647 US |
| 312-866-9149 | Massage Reflexology | 113 Colorado Avenue Ames 50014 US |
| 312-866-9555 | Grand Mongolian Hot Pot | 2904 North Broadway Chicago 60657 US |
Reports
Anonymous User from , IL
December 4, 2025 at 11:12 PM
Anonymous User from , IL
July 4, 2025 at 6:38 AM
Anonymous User from , MA
August 23, 2024 at 11:04 PM
Anonymous User from Weehawken, New Jersey
May 24, 2024 at 4:11 PM
Anonymous User from St Petersburg, Florida
September 19, 2023 at 7:08 PM
Anonymous User from Las Vegas, Nevada
July 6, 2023 at 4:57 PM