Local Calling Guide
Area code/prefix search
Washington Zone 14 (Baltimore LATA), MD
1 2 3 >>
NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
240-509
| A |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
|
|
240-509
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-06-06 |
|
240-509
| 1 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-05 |
|
240-509
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-06-16 |
|
240-509
| 3 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
240-509
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-06-16 |
|
240-509
| 5 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2018-06-16 |
|
240-509
| 6 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2019-12-28 |
|
240-509
| 7 |
BLTMMDDN2MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
238 |
|
2014-06-25 |
|
240-509
| 8 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-05 |
|
240-509
| 9 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-01-02 |
|
240-742
| A |
BLTMMDCHXKX |
478J NUSO, LLC |
238 |
|
|
|
240-742
| 0 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2023-10-20 |
|
240-742
| 1 |
BLTMMDCHXKX |
478J NUSO, LLC |
238 |
|
2021-01-21 |
|
240-742
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-03-04 |
|
240-742
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-07-12 |
|
240-742
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2022-10-16 |
|
240-742
| 5 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-03 |
|
240-742
| 6 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-23 |
|
240-742
| 7 |
BLTMMDCHXMX |
506J TWILIO INTERNATIONAL, INC. |
238 |
|
2021-01-23 |
|
240-742
| 8 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-03 |
|
240-742
| 9 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2021-12-02 |
|
240-842
| A |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
240-842
| 0 |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
240-842
| 1 |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
240-842
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
240-842
| 3 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-12-09 |
|
240-842
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
240-842
| 5 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2012-08-26 |
|
240-842
| 6 |
CLMAMDJTBMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
2016-11-21 |
|
240-842
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
240-842
| 8 |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-04-26 |
|
240-842
| 9 |
BLTMMDCHXNX |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
238 |
|
|
|
240-865
| A |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
240-865
| 0 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2008-02-01 |
|
240-865
| 1 |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
2006-01-14 |
|
240-865
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2008-04-07 |
|
240-865
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2012-09-06 |
|
240-865
| 4 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-08-11 |
|
240-865
| 5 |
CHCHMDBE6MD |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
2007-03-02 |
|
240-865
| 6 |
BLTQMD018MD |
145J TERRA NOVA TELECOM INC. |
238 |
|
2023-08-06 |
|
240-865
| 7 |
PIVLMDPKFMD |
9170 BROADVIEW NETWORKS, INC. - MD |
238 |
|
2007-09-20 |
|
240-865
| 8 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2007-12-03 |
|
240-865
| 9 |
BLTMMDCH25Z |
8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) |
238 |
|
2006-05-05 |
|
301-205
| A |
MAYOMDMYRS1 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
301-205
| 0 |
MAYOMDMYRS1 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
301-205
| 1 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2016-05-14 |
|
301-205
| 2 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2016-05-14 |
|
301-205
| 3 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2016-05-14 |
|
301-205
| 4 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2016-05-14 |
|
1 2 3 >>
Last updated: Tue, 16 Apr 2024 01:38:01 UTC
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