Local Calling Guide
Area code/prefix search
Ridge, MD
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-244
| A |
|
321J HD CARRIER LLC |
236 |
|
|
|
| 227-244
| 6 |
|
321J HD CARRIER LLC |
236 |
|
2024-07-27 |
|
| 240-201
| A |
WASHDC12DS6 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
| 240-201
| 0 |
|
073H TELNYX LLC |
236 |
|
2020-10-01 |
|
| 240-201
| 1 |
|
073H TELNYX LLC |
236 |
|
2021-03-21 |
|
| 240-201
| 2 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-10-17 |
|
| 240-201
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2021-04-02 |
|
| 240-201
| 4 |
|
876D ONVOY, LLC - MD |
236 |
|
2021-04-02 |
|
| 240-201
| 5 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2022-05-20 |
|
| 240-201
| 6 |
|
073H TELNYX LLC |
236 |
|
2023-02-26 |
|
| 240-201
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2021-09-24 |
|
| 240-201
| 8 |
|
073H TELNYX LLC |
236 |
|
2022-09-25 |
|
| 240-201
| 9 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
| 240-219
| A |
WASHDC12DS6 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
| 240-219
| 0 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2014-11-13 |
|
| 240-219
| 1 |
|
073H TELNYX LLC |
236 |
|
2017-04-27 |
|
| 240-219
| 2 |
|
876D ONVOY, LLC - MD |
236 |
|
2017-05-18 |
|
| 240-219
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2018-06-07 |
|
| 240-219
| 4 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-07-04 |
|
| 240-219
| 5 |
|
876D ONVOY, LLC - MD |
236 |
|
2018-09-13 |
|
| 240-219
| 6 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-07-04 |
|
| 240-219
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2016-03-14 |
|
| 240-219
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2016-03-14 |
|
| 240-219
| 9 |
|
876D ONVOY, LLC - MD |
236 |
|
2015-06-27 |
|
| 240-248
| A |
WASHDC12DS6 |
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
| 240-248
| 0 |
|
073H TELNYX LLC |
236 |
|
2021-12-23 |
|
| 240-248
| 1 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-05-21 |
|
| 240-248
| 2 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2023-08-19 |
|
| 240-248
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2021-07-12 |
|
| 240-248
| 4 |
|
073H TELNYX LLC |
236 |
|
2024-02-04 |
|
| 240-248
| 5 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2021-12-02 |
|
| 240-248
| 6 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2023-02-27 |
|
| 240-248
| 7 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-11-15 |
|
| 240-248
| 8 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-11-15 |
|
| 240-248
| 9 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
|
|
| 240-258
| A |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 240-258
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2004-03-26 |
|
| 240-258
| 1 |
|
829J PAETEC ITEL, LLC |
236 |
|
2004-02-05 |
|
| 240-258
| 2 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-03-05 |
|
| 240-258
| 3 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2022-01-27 |
|
| 240-258
| 4 |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
236 |
|
2014-06-12 |
|
| 240-258
| 5 |
|
228C IDT AMERICA, CORP. - MD |
236 |
|
2007-09-12 |
|
| 240-258
| 6 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2008-02-13 |
|
| 240-258
| 7 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2012-09-24 |
|
| 240-258
| 8 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2008-12-13 |
|
| 240-258
| 9 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 240-634
| A |
CHCHMDBEPS0 |
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2024-01-16 |
|
| 240-634
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-08-02 |
|
| 240-634
| 1 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-08-02 |
|
| 240-634
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-08-02 |
|
| 240-634
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-10-17 |
|
| 240-634
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-07-30 |
|
| 240-634
| 5 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-07-30 |
|
| 240-634
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-03-29 |
|
| 240-634
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-03-29 |
|
| 240-634
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2019-02-19 |
|
| 240-634
| 9 |
|
876D ONVOY, LLC - MD |
236 |
|
2019-02-19 |
|
| 240-844
| A |
VINNVACBDS0 |
876D ONVOY, LLC - MD |
236 |
|
|
|
| 240-844
| 0 |
|
073H TELNYX LLC |
236 |
|
2024-02-04 |
|
| 240-844
| 1 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-02-22 |
|
| 240-844
| 2 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
236 |
|
2010-11-18 |
|
| 240-844
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2012-10-07 |
|
| 240-844
| 4 |
|
876D ONVOY, LLC - MD |
236 |
|
|
|
| 240-844
| 5 |
|
876D ONVOY, LLC - MD |
236 |
|
2005-08-15 |
|
| 240-844
| 6 |
|
145J TERRA NOVA TELECOM INC. |
236 |
|
2024-03-03 |
|
| 240-844
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2005-08-15 |
|
| 240-844
| 8 |
|
073H TELNYX LLC |
236 |
|
2024-03-03 |
|
| 240-844
| 9 |
|
829J PAETEC ITEL, LLC |
236 |
|
2004-03-27 |
|
| 301-872
| A |
RIDGMDRIRS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 1 |
|
073H TELNYX LLC |
236 |
|
2023-06-18 |
|
| 301-872
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2023-06-17 |
|
| 301-872
| 4 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 5 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 6 |
|
073H TELNYX LLC |
236 |
|
2024-02-04 |
|
| 301-872
| 7 |
|
073H TELNYX LLC |
236 |
|
2024-02-04 |
|
| 301-872
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-872
| 9 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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