Local Calling Guide
Area code/prefix search
NPA: 312
[Rate centres in NPA 312]
[Dial plan for NPA 312]
NXX: 452
NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
312-452
| A |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 0 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 1 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 2 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 3 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 4 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 5 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 6 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 7 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 8 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
312-452
| 9 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2025-10-28 |
|
Last updated: Mon, 15 Sep 2025 02:24:40 UTC
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