Local Calling Guide
Area code/prefix search
Gaithersburg, MD
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 240-813
| 5 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2005-04-26 |
|
| 240-813
| 6 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-813
| 7 |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2009-12-22 |
|
| 240-813
| 8 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2011-01-21 |
|
| 240-813
| 9 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-06-26 |
|
| 240-848
| A |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
|
|
| 240-848
| 0 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2011-02-10 |
|
| 240-848
| 1 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2004-07-12 |
|
| 240-848
| 2 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2004-12-27 |
|
| 240-848
| 3 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2004-12-27 |
|
| 240-848
| 4 |
BTVLMD12CMA |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2005-03-28 |
|
| 240-848
| 5 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2005-04-20 |
|
| 240-848
| 6 |
BTVLMD12CMA |
5562 METROPCS, INC. |
236 |
|
2005-09-19 |
|
| 240-848
| 7 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-08-16 |
|
| 240-848
| 8 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2011-02-10 |
|
| 240-848
| 9 |
LARLMDCCAMD |
7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
236 |
|
2011-10-04 |
|
| 240-912
| A |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
2025-04-02 |
|
| 240-912
| 0 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-912
| 1 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-912
| 2 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-912
| 3 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-912
| 4 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2006-12-12 |
|
| 240-912
| 5 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2006-12-12 |
|
| 240-912
| 6 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2006-12-12 |
|
| 240-912
| 7 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2006-12-12 |
|
| 240-912
| 8 |
WASHDCSWXZZ |
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-912
| 9 |
ARTNVAARXDY |
318J COMCAST IP PHONE, LLC |
236 |
|
2006-12-12 |
|
| 240-937
| A |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
|
|
| 240-937
| 0 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 1 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 2 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 3 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 4 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 5 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-24 |
|
| 240-937
| 6 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2022-09-25 |
|
| 240-937
| 7 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2023-08-18 |
|
| 240-937
| 8 |
WASHDCDP8MD |
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-11-06 |
|
| 240-937
| 9 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2023-06-07 |
|
| 240-981
| A |
WASHDC093MD |
732J NUSO, LLC |
236 |
|
|
|
| 240-981
| 0 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2023-09-02 |
|
| 240-981
| 1 |
WASHDC093MD |
732J NUSO, LLC |
236 |
|
2023-04-03 |
|
| 240-981
| 2 |
CHCHMDBEWMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
236 |
|
2023-09-02 |
|
| 240-981
| 3 |
WASHDC12NMD |
490J BOOST SUBSCRIBERCO L.L.C. |
236 |
|
2024-01-21 |
|
| 240-981
| 4 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-981
| 5 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-981
| 6 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-981
| 7 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-981
| 8 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-981
| 9 |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
2023-09-14 |
|
| 240-982
| A |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
|
|
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Last updated: Thu, 16 Jul 2026 02:21:55 UTC
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