Local Calling Guide
Area code/prefix search
Frederick, MD
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 227-281
| 5 |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2026-03-02 |
|
| 227-281
| 6 |
|
876D ONVOY, LLC - MD |
240 |
|
2026-01-04 |
|
| 227-281
| 7 |
|
876D ONVOY, LLC - MD |
240 |
|
2025-10-12 |
|
| 227-281
| 8 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2025-07-29 |
|
| 227-281
| 9 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2025-07-29 |
|
| 227-666
| A |
|
876D ONVOY, LLC - MD |
240 |
|
2026-02-17 |
|
| 227-666
| 0 |
|
876D ONVOY, LLC - MD |
240 |
|
2026-02-17 |
|
| 227-666
| 6 |
|
876D ONVOY, LLC - MD |
240 |
|
2026-02-17 |
|
| 227-800
| A |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 227-800
| 0 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 227-800
| 1 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2025-01-21 |
|
| 227-800
| 2 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 227-800
| 3 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
240 |
|
2025-01-21 |
|
| 227-800
| 4 |
|
876D ONVOY, LLC - MD |
240 |
|
2025-04-06 |
|
| 227-800
| 5 |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2025-04-15 |
|
| 227-800
| 6 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 227-800
| 7 |
|
876D ONVOY, LLC - MD |
240 |
|
2025-03-02 |
|
| 227-800
| 8 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 227-800
| 9 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2025-01-02 |
|
| 240-215
| A |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
|
|
| 240-215
| 0 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
|
|
| 240-215
| 1 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
|
|
| 240-215
| 2 |
|
7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
240 |
|
2002-04-06 |
|
| 240-215
| 3 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2005-02-07 |
|
| 240-215
| 4 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2002-06-28 |
|
| 240-215
| 5 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2005-06-02 |
|
| 240-215
| 6 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
|
|
| 240-215
| 7 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2005-06-02 |
|
| 240-215
| 8 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
|
|
| 240-215
| 9 |
FRDRMDFRXPX |
624H ONVOY SPECTRUM, LLC |
240 |
|
2021-11-18 |
|
| 240-225
| A |
HGTWMD53DS0 |
2593 CORE COMMUNICATIONS, INC.- MD |
240 |
|
|
|
| 240-236
| A |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 0 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 1 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 2 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 3 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 4 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 5 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 6 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
2002-06-20 |
|
| 240-236
| 7 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 8 |
FRDRMDFRDS1 |
9212 VERIZON MARYLAND, INC. |
240 |
|
|
|
| 240-236
| 9 |
FRDRMDFRXMD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
240 |
|
2015-02-06 |
|
| 240-285
| A |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
|
|
| 240-285
| 0 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2003-08-19 |
|
| 240-285
| 1 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2003-11-03 |
|
| 240-285
| 2 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2004-09-29 |
|
| 240-285
| 3 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2004-11-04 |
|
| 240-285
| 4 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2004-12-02 |
|
| 240-285
| 5 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2003-07-05 |
|
| 240-285
| 6 |
FRDRMDFRXSX |
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
240 |
|
2004-04-20 |
|
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Last updated: Wed, 04 Mar 2026 03:00:52 UTC
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