Local Calling Guide
Area code/prefix search
Washington Zone 15 (Baltimore LATA), MD
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-260
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2025-01-11 |
|
| 227-260
| 0 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2025-01-11 |
|
| 227-888
| A |
BLTMMDCHYMD |
530H WIDE VOICE, LLC - MD |
238 |
|
|
|
| 227-888
| 0 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-04-13 |
|
| 227-888
| 1 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-07-12 |
|
| 227-888
| 2 |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2023-11-21 |
|
| 227-888
| 3 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2024-11-20 |
|
| 227-888
| 4 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2024-01-14 |
|
| 227-888
| 5 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2024-01-14 |
|
| 227-888
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-11-04 |
|
| 227-888
| 7 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2023-11-20 |
|
| 227-888
| 8 |
BLTMMDCHYMD |
530H WIDE VOICE, LLC - MD |
238 |
|
2023-11-20 |
|
| 227-888
| 9 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-10-04 |
|
| 240-759
| A |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
|
|
| 240-759
| 0 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-10 |
|
| 240-759
| 1 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-03-10 |
|
| 240-759
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-05-22 |
|
| 240-759
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2023-06-16 |
|
| 240-759
| 4 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2022-01-17 |
|
| 240-759
| 5 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2022-01-17 |
|
| 240-759
| 6 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2022-10-27 |
|
| 240-759
| 7 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-23 |
|
| 240-759
| 8 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2024-08-24 |
|
| 240-759
| 9 |
BLTQMD01BMD |
516J TON80 COMMUNICATIONS, LLC |
238 |
|
2021-11-18 |
|
| 240-763
| A |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
|
|
| 240-763
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-11-30 |
|
| 240-763
| 1 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-04-28 |
|
| 240-763
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-04-28 |
|
| 240-763
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-03-25 |
|
| 240-763
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-03-25 |
|
| 240-763
| 5 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2019-03-07 |
|
| 240-763
| 6 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2019-06-19 |
|
| 240-763
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2019-02-19 |
|
| 240-763
| 8 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2019-02-19 |
|
| 240-763
| 9 |
BLTMMDCHX7X |
073H TELNYX LLC |
238 |
|
2017-04-26 |
|
| 301-327
| A |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
|
|
| 301-327
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2014-09-01 |
|
| 301-327
| 1 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-01-02 |
|
| 301-327
| 2 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-07-26 |
|
| 301-327
| 3 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2007-12-01 |
|
| 301-327
| 4 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-10-17 |
|
| 301-327
| 5 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2008-02-29 |
|
| 301-327
| 6 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2008-09-30 |
|
| 301-327
| 7 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2007-08-20 |
|
| 301-327
| 8 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2008-09-16 |
|
| 301-327
| 9 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2008-03-15 |
|
| 301-494
| A |
PRFRMDPFRS1 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-494
| 0 |
PRFRMDPFRS1 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-494
| 1 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2012-06-25 |
|
| 301-494
| 2 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2015-03-27 |
|
| 301-494
| 3 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2015-03-06 |
|
| 301-494
| 4 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2011-03-11 |
|
| 301-494
| 5 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2011-06-17 |
|
| 301-494
| 6 |
BLTMMDDN2MD |
508J CENTURYLINK COMMUNICATIONS, LLC |
238 |
|
2014-06-25 |
|
| 301-494
| 7 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2011-06-17 |
|
| 301-494
| 8 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-05 |
|
| 301-494
| 9 |
BLTQMD01DS0 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
238 |
|
2013-05-05 |
|
| 301-812
| A |
NRBHMDNEDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-812
| 0 |
NRBHMDNEDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-812
| 1 |
NRBHMDNEDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-812
| 2 |
NRBHMDNEDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
| 301-812
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2015-09-05 |
|
| 301-812
| 4 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2012-10-08 |
|
| 301-812
| 5 |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
2013-08-28 |
|
| 301-812
| 6 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2013-11-26 |
|
| 301-812
| 7 |
BLTMMDSNDS6 |
281E YMAX COMMUNICATIONS CORP. - MD |
238 |
|
2010-10-04 |
|
| 301-812
| 8 |
BLTMMDCH25Z |
8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) |
238 |
|
2015-06-22 |
|
| 301-812
| 9 |
HRNDVACKAMD |
1958 ATX TELECOMMUNICATIONS SERVICES, LTD. |
238 |
|
2004-01-31 |
|
| 301-855
| A |
NRBHMDNEDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
Last updated: Sun, 26 Jan 2025 15:59:20 UTC
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