Local Calling Guide
Area code/prefix search
Washington Zone 16, MD
<< 1 2 3 4 5 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 240-846
| 6 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 240-846
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 240-846
| 8 |
|
515J IP HORIZON LLC |
236 |
|
2016-05-31 |
|
| 240-846
| 9 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-05-01 |
|
| 240-897
| A |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-897
| 0 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2022-01-28 |
|
| 240-897
| 1 |
|
5562 METROPCS, INC. |
236 |
|
2021-12-03 |
|
| 240-897
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 240-897
| 3 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2021-12-03 |
|
| 240-897
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-05-01 |
|
| 240-897
| 5 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 240-897
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 240-897
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 240-897
| 8 |
|
073H TELNYX LLC |
236 |
|
2017-04-27 |
|
| 240-897
| 9 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 240-949
| A |
|
829J PAETEC ITEL, LLC |
236 |
|
2025-04-02 |
|
| 240-949
| 0 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-949
| 1 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-06-11 |
|
| 240-949
| 2 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-01-04 |
|
| 240-949
| 3 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-949
| 4 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2003-08-23 |
|
| 240-949
| 5 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-949
| 6 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-01-04 |
|
| 240-949
| 7 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-05-05 |
|
| 240-949
| 8 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-949
| 9 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 240-966
| A |
ARTNVAARXJY |
516J TON80 COMMUNICATIONS, LLC |
236 |
|
2024-01-31 |
|
| 240-966
| 0 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-22 |
|
| 240-966
| 1 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-09-22 |
|
| 240-966
| 2 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2022-07-19 |
|
| 240-966
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2022-07-19 |
|
| 240-966
| 4 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-10-15 |
|
| 240-966
| 5 |
|
876D ONVOY, LLC - MD |
236 |
|
2022-10-15 |
|
| 240-966
| 6 |
|
516J TON80 COMMUNICATIONS, LLC |
236 |
|
2022-04-30 |
|
| 240-966
| 7 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2023-06-15 |
|
| 240-966
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2023-08-10 |
|
| 240-966
| 9 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2023-02-27 |
|
| 301-234
| A |
ALTWMDATRP0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-234
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-234
| 1 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-22 |
|
| 301-234
| 2 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-12-09 |
|
| 301-234
| 3 |
|
829J PAETEC ITEL, LLC |
236 |
|
2017-10-06 |
|
| 301-234
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 301-234
| 5 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-22 |
|
| 301-234
| 6 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2008-05-16 |
|
| 301-234
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2018-09-13 |
|
| 301-234
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2018-09-13 |
|
| 301-234
| 9 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-22 |
|
| 301-235
| A |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-235
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2004-03-26 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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