Local Calling Guide
Area code/prefix search
NPA: 227
[Rate centres in NPA 227]
[Dial plan for NPA 227]
NXX: 258
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-258
| A |
Gaithersburg |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2024-12-22 |
|
| 227-258
| 0 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-09-06 |
|
| 227-258
| 1 |
Gaithersburg |
MD |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2025-01-06 |
|
| 227-258
| 2 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-03-02 |
|
| 227-258
| 3 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-05-03 |
|
| 227-258
| 4 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-05-03 |
|
| 227-258
| 5 |
Gaithersburg |
MD |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2025-05-31 |
|
| 227-258
| 6 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-11-08 |
|
| 227-258
| 7 |
Gaithersburg |
MD |
|
876D ONVOY, LLC - MD |
236 |
|
2025-11-08 |
|
| 227-258
| 8 |
Gaithersburg |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2024-12-22 |
|
| 227-258
| 9 |
Gaithersburg |
MD |
BTVLMD18GT0 |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2024-12-22 |
|
Last updated: Sun, 07 Dec 2025 22:02:11 UTC
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