Local Calling Guide
Area code/prefix search
Washington Zone 10, MD
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-310
| 1 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-09-28 |
|
| 227-310
| 2 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-09-28 |
|
| 227-310
| 3 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-310
| 4 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-310
| 5 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-310
| 6 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-310
| 7 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-310
| 8 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-04-27 |
|
| 227-319
| A |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-10-26 |
|
| 227-319
| 0 |
|
820C INTRADO COMMUNICATIONS, LLC |
236 |
|
2026-10-27 |
|
| 227-319
| 7 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-10-26 |
|
| 227-319
| 8 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-10-26 |
|
| 227-319
| 9 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2026-10-26 |
|
| 227-338
| A |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2025-12-04 |
|
| 227-338
| 0 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 1 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 2 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 3 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 4 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 5 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 6 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 7 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 8 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2025-12-23 |
|
| 227-338
| 9 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2025-12-04 |
|
| 227-999
| A |
WASHDCSWFMD |
530H WIDE VOICE, LLC - MD |
236 |
|
|
|
| 227-999
| 0 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-10-01 |
|
| 227-999
| 1 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-02-19 |
|
| 227-999
| 2 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-02-19 |
|
| 227-999
| 3 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-02-19 |
|
| 227-999
| 4 |
WASHDCSWMMD |
624H ONVOY SPECTRUM, LLC |
236 |
|
2024-01-14 |
|
| 227-999
| 5 |
WASHDCSWMMD |
624H ONVOY SPECTRUM, LLC |
236 |
|
2024-01-14 |
|
| 227-999
| 6 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-02-19 |
|
| 227-999
| 7 |
WASHDCSWNMD |
321J HD CARRIER LLC |
236 |
|
2023-12-15 |
|
| 227-999
| 8 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2024-02-19 |
|
| 227-999
| 9 |
WASHDCSWFMD |
530H WIDE VOICE, LLC - MD |
236 |
|
2023-12-15 |
|
| 240-205
| A |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
|
|
| 240-205
| 0 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-03-04 |
|
| 240-205
| 1 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2003-09-13 |
|
| 240-205
| 2 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2003-09-13 |
|
| 240-205
| 3 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2003-09-13 |
|
| 240-205
| 4 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2005-12-02 |
|
| 240-205
| 5 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2005-12-02 |
|
| 240-205
| 6 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-10-02 |
|
| 240-205
| 7 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-01-02 |
|
| 240-205
| 8 |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-01-02 |
|
| 240-205
| 9 |
WASKDCFNAMD |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2006-04-01 |
|
| 240-238
| A |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
2025-04-02 |
|
| 240-268
| A |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-268
| 0 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-268
| 1 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 >>
Last updated: Tue, 29 Sep 2026 03:00:13 UTC
Sponsored by: Callcentric - VoIP Internet phone service
Like this site? We accept donations via PayPal.