Local Calling Guide
Area code/prefix search
NPA: 557
[Rate centres in NPA 557]
[Dial plan for NPA 557]
NXX: 221
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 557-221
| A |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2024-06-01 |
|
| 557-221
| 0 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2024-06-01 |
|
| 557-221
| 1 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2024-07-12 |
|
| 557-221
| 2 |
Mehlville |
MO |
STLSMO05XMX |
624H ONVOY SPECTRUM, LLC |
520 |
|
2024-12-05 |
|
| 557-221
| 3 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2025-03-13 |
|
| 557-221
| 4 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2025-03-13 |
|
| 557-221
| 5 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2025-10-12 |
|
| 557-221
| 6 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2026-01-04 |
|
| 557-221
| 7 |
Mehlville |
MO |
NWTPMOABGT1 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
520 |
|
2024-11-01 |
|
| 557-221
| 8 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2024-07-12 |
|
| 557-221
| 9 |
Mehlville |
MO |
STLSMOWQDS2 |
093F ONVOY, LLC - MO |
520 |
|
2024-07-12 |
|
Last updated: Tue, 01 Sep 2026 00:40:05 UTC
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