Local Calling Guide
Area code/prefix search
Crofton, MD
1 2 >>
NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
410-451
| A |
COTNMDCRDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
410-721
| A |
COTNMDCRDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
|
|
410-774
| A |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
|
|
410-774
| 0 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-03-25 |
|
410-774
| 1 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2006-03-25 |
|
410-774
| 2 |
BLTMMDCH08Z |
4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD |
238 |
|
2004-02-14 |
|
410-774
| 3 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2019-04-30 |
|
410-774
| 4 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2003-08-20 |
|
410-774
| 5 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2005-02-11 |
|
410-774
| 6 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-02-22 |
|
410-774
| 7 |
COTNMDCRDS0 |
9212 VERIZON MARYLAND, INC. |
238 |
|
2005-10-15 |
|
410-774
| 8 |
BLTMMDCHAMD |
2217 ATX TELECOMMUNICATIONS SERVICES, LTD. - MD |
238 |
|
2003-02-25 |
|
410-774
| 9 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
|
|
443-292
| A |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
|
|
443-292
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
238 |
|
2004-03-29 |
|
443-292
| 1 |
BLTMMDFMDS0 |
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
238 |
|
2006-07-31 |
|
443-292
| 2 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2011-10-14 |
|
443-292
| 3 |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
2007-10-03 |
|
443-292
| 4 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2005-03-10 |
|
443-292
| 5 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2008-01-25 |
|
443-292
| 6 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2010-09-04 |
|
443-292
| 7 |
PIVLMDPKQMD |
9170 BROADVIEW NETWORKS, INC. - MD |
238 |
|
2010-10-22 |
|
443-292
| 8 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2006-12-29 |
|
443-292
| 9 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2012-06-15 |
|
443-302
| A |
BLTOMDXIDS0 |
6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD |
238 |
|
|
|
443-302
| 0 |
BLTOMDXIDS0 |
6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD |
238 |
|
|
|
443-302
| 1 |
BLTOMDXIDS0 |
6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD |
238 |
|
|
|
443-302
| 2 |
BLTMMDCHXFX |
318J COMCAST IP PHONE, LLC |
238 |
|
2008-03-20 |
|
443-302
| 3 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-05-21 |
|
443-302
| 4 |
BLTOMDXIDS0 |
6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD |
238 |
|
|
|
443-302
| 5 |
BLTMMDCHXMX |
506J TWILIO INTERNATIONAL, INC. |
238 |
|
2020-12-26 |
|
443-302
| 6 |
BLTOMDKHDS0 |
7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD |
238 |
|
2008-10-01 |
|
443-302
| 7 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2008-02-12 |
|
443-302
| 8 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-05-21 |
|
443-302
| 9 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2008-12-11 |
|
443-332
| A |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
|
|
443-332
| 0 |
HNVAMDBHAMD |
3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
238 |
|
|
|
443-332
| 1 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-09-12 |
|
443-332
| 2 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
443-332
| 3 |
|
876D ONVOY, LLC - MD |
238 |
|
2024-03-03 |
|
443-332
| 4 |
CLMAMDJTAMD |
2589 US LEC OF MARYLAND, INC. |
238 |
|
2002-07-12 |
|
443-332
| 5 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2021-08-30 |
|
443-332
| 6 |
BLTMMDCHW29 |
4716 PAETEC COMMUNICATIONS, INC. - MD |
238 |
|
2006-03-28 |
|
443-332
| 7 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
443-332
| 8 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2020-11-29 |
|
443-332
| 9 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2021-04-29 |
|
443-584
| A |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-584
| 0 |
BLTMMDCHXUX |
624H ONVOY SPECTRUM, LLC |
238 |
|
2021-05-22 |
|
443-584
| 1 |
BLTMMDCH14Z |
2697 CTC COMMUNICATIONS CORP. - MD |
238 |
|
|
|
443-584
| 2 |
|
145J TERRA NOVA TELECOM INC. |
238 |
|
2024-02-15 |
|
1 2 >>
Last updated: Fri, 22 Mar 2024 03:02:44 UTC
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