Local Calling Guide
Area code/prefix search
Baltimore, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 667-539
| 0 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2026-05-02 |
|
| 667-539
| 1 |
BLTMMDCH45Z |
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2026-05-02 |
|
| 667-539
| 2 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-06-27 |
|
| 667-539
| 3 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-06-27 |
|
| 667-539
| 4 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-06-27 |
|
| 667-539
| 5 |
BLTQMD019MD |
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2026-06-14 |
|
| 667-539
| 6 |
BLTQMD019MD |
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2026-07-28 |
|
| 667-539
| 7 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-06-27 |
|
| 667-539
| 8 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-06-27 |
|
| 667-539
| 9 |
CLMAMDORAMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-04-06 |
|
| 667-547
| A |
BLTMMDSNOMD |
671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS |
238 |
|
2026-07-21 |
|
| 667-547
| 0 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2026-09-13 |
|
| 667-547
| 1 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2026-08-08 |
|
| 667-547
| 2 |
|
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2026-08-13 |
|
| 667-547
| 3 |
|
071F BANDWIDTH.COM CLEC, LLC - MD |
238 |
|
2026-09-13 |
|
| 667-547
| 4 |
|
820C INTRADO COMMUNICATIONS, LLC |
238 |
|
2026-09-13 |
|
| 667-547
| 5 |
BLTMMDSNOMD |
671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS |
238 |
|
2026-07-21 |
|
| 667-547
| 6 |
|
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2026-09-21 |
|
| 667-547
| 7 |
BLTQMD019MD |
490J BOOST SUBSCRIBERCO L.L.C. |
238 |
|
2026-10-26 |
|
| 667-547
| 8 |
|
876D ONVOY, LLC - MD |
238 |
|
2026-07-22 |
|
| 667-547
| 9 |
|
876D ONVOY, LLC - MD |
238 |
|
2026-07-22 |
|
| 667-560
| A |
|
5562 METROPCS, INC. |
238 |
|
2026-10-02 |
|
| 667-560
| 0 |
|
820C INTRADO COMMUNICATIONS, LLC |
238 |
|
2026-10-05 |
|
| 667-560
| 1 |
|
820C INTRADO COMMUNICATIONS, LLC |
238 |
|
2026-10-05 |
|
| 667-560
| 2 |
|
5562 METROPCS, INC. |
238 |
|
2026-10-05 |
|
| 667-560
| 3 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 4 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 5 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 6 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 7 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 8 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-05 |
|
| 667-560
| 9 |
|
5562 METROPCS, INC. |
238 |
|
2026-10-02 |
|
| 667-570
| A |
|
5562 METROPCS, INC. |
238 |
|
2026-10-22 |
|
| 667-570
| 0 |
|
876D ONVOY, LLC - MD |
238 |
|
2026-10-23 |
|
| 667-570
| 5 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-23 |
|
| 667-570
| 6 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-23 |
|
| 667-570
| 7 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-23 |
|
| 667-570
| 8 |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
238 |
|
2026-10-23 |
|
| 667-570
| 9 |
|
5562 METROPCS, INC. |
238 |
|
2026-10-22 |
|
| 667-600
| A |
BLTMMDCHXMD |
139F WORLDCALL INTERCONNECT INC. |
238 |
|
|
|
| 667-600
| 0 |
BLTMMDCHXMD |
139F WORLDCALL INTERCONNECT INC. |
238 |
|
2015-11-13 |
|
| 667-600
| 1 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
| 667-600
| 2 |
PIVLMDPKXEX |
829J PAETEC ITEL, LLC |
238 |
|
2016-07-28 |
|
| 667-600
| 3 |
PIVLMDPKXEX |
829J PAETEC ITEL, LLC |
238 |
|
2016-07-28 |
|
| 667-600
| 4 |
PIVLMDPKXEX |
829J PAETEC ITEL, LLC |
238 |
|
2016-07-28 |
|
| 667-600
| 5 |
BLTMMDSN6MD |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
238 |
|
2020-04-17 |
|
| 667-600
| 6 |
BLTMMDCH42Z |
876D ONVOY, LLC - MD |
238 |
|
2016-01-02 |
|
| 667-600
| 7 |
BLTMMDCHXVX |
321J HD CARRIER LLC |
238 |
|
2020-05-02 |
|
| 667-600
| 8 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
| 667-600
| 9 |
BLTMMDCH40Z |
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
238 |
|
2016-02-06 |
|
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Last updated: Tue, 29 Sep 2026 03:00:13 UTC
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