Local Calling Guide
Area code/prefix search
Preston, MD
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 410-673
| A |
PSTNMDPSRS0 |
9212 VERIZON MARYLAND, INC. |
242 |
|
|
|
| 410-673
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2004-04-03 |
|
| 410-673
| 1 |
|
9212 VERIZON MARYLAND, INC. |
242 |
|
|
|
| 410-673
| 2 |
|
9212 VERIZON MARYLAND, INC. |
242 |
|
|
|
| 410-673
| 3 |
|
073H TELNYX LLC |
242 |
|
2017-09-13 |
|
| 410-673
| 4 |
|
876D ONVOY, LLC - MD |
242 |
|
2017-04-14 |
|
| 410-673
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2019-03-28 |
|
| 410-673
| 7 |
|
9212 VERIZON MARYLAND, INC. |
242 |
|
|
|
| 410-673
| 8 |
|
318J COMCAST IP PHONE, LLC |
242 |
|
2006-07-31 |
|
| 410-673
| 9 |
|
9212 VERIZON MARYLAND, INC. |
242 |
|
|
|
| 667-238
| A |
ESTNMDBNGT0 |
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
|
|
| 667-238
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2018-08-03 |
|
| 667-238
| 1 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2018-08-03 |
|
| 667-238
| 2 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2018-08-03 |
|
| 667-238
| 3 |
|
876D ONVOY, LLC - MD |
242 |
|
2021-03-05 |
|
| 667-238
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2019-05-02 |
|
| 667-238
| 5 |
|
876D ONVOY, LLC - MD |
242 |
|
2023-02-12 |
|
| 667-238
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2019-05-02 |
|
| 667-238
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
242 |
|
2019-05-02 |
|
| 667-238
| 8 |
|
876D ONVOY, LLC - MD |
242 |
|
2019-03-04 |
|
| 667-238
| 9 |
|
876D ONVOY, LLC - MD |
242 |
|
2019-03-04 |
|
| 667-342
| A |
SLBRMDSBXVX |
876D ONVOY, LLC - MD |
242 |
|
|
|
| 667-342
| 0 |
|
624H ONVOY SPECTRUM, LLC |
242 |
|
2023-09-02 |
|
| 667-342
| 2 |
|
876D ONVOY, LLC - MD |
242 |
|
2021-10-31 |
|
| 667-342
| 3 |
|
876D ONVOY, LLC - MD |
242 |
|
2021-12-20 |
|
| 667-342
| 4 |
|
318J COMCAST IP PHONE, LLC |
242 |
|
2022-07-05 |
|
| 667-342
| 5 |
|
876D ONVOY, LLC - MD |
242 |
|
2022-12-03 |
|
| 667-342
| 6 |
|
516J TON80 COMMUNICATIONS, LLC |
242 |
|
2022-03-21 |
|
| 667-342
| 7 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
242 |
|
2022-11-18 |
|
| 667-342
| 8 |
|
876D ONVOY, LLC - MD |
242 |
|
2022-12-24 |
|
| 667-342
| 9 |
|
876D ONVOY, LLC - MD |
242 |
|
2023-06-17 |
|
| 667-449
| A |
SLBRMD901MD |
939H COMMIO, LLC |
242 |
|
|
|
| 667-449
| 0 |
|
939H COMMIO, LLC |
242 |
|
2023-11-04 |
|
| 667-449
| 1 |
|
939H COMMIO, LLC |
242 |
|
2023-11-04 |
|
| 667-449
| 2 |
|
939H COMMIO, LLC |
242 |
|
2023-11-04 |
|
| 667-449
| 3 |
|
939H COMMIO, LLC |
242 |
|
2023-11-04 |
|
| 667-449
| 4 |
|
939H COMMIO, LLC |
242 |
|
2023-11-04 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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