You are reviewing the Area Code (NPA/NXX) report for 312-378. Did you mean to search the SMS short code 312378?
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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 | 312378 |
| Basic Format | 312-378 |
| NPA (Area Code) | 312 |
| NXX | 378 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | City | State |
|---|---|---|---|---|---|---|
| 312-378-XXXX | 6630 | SPOK, INC. | CHICGOZN01 | AS | CHICAGO ZONE 01 | IL |
Reports
Anonymous User from , IL
July 8, 2025 at 4:33 PM
Anonymous User from Rochester, New York
December 31, 2024 at 7:23 PM
Anonymous User from Chicago, IL
November 24, 2023 at 9:59 PM
Anonymous User from Chicago, Illinois
August 17, 2023 at 5:00 PM
Anonymous User from Palos Hills, Illinois
August 2, 2023 at 12:12 PM
Anonymous User from , IL
May 18, 2023 at 6:04 PM
Anonymous User from , IL
January 23, 2023 at 2:20 PM
Anonymous User from , IL
June 10, 2022 at 10:56 AM
Anonymous User from , PA
April 13, 2017 at 4:38 PM
Anonymous User from , PA
November 16, 2015 at 8:36 PM