Local Calling Guide
Area code/prefix search
Washington Zone 16, MD
<< 1 2 3 4 5 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 301-235
| 1 |
|
876D ONVOY, LLC - MD |
236 |
|
2019-02-19 |
|
| 301-235
| 2 |
|
876D ONVOY, LLC - MD |
236 |
|
2018-06-08 |
|
| 301-235
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2015-09-02 |
|
| 301-235
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 301-235
| 5 |
|
964H BARR TELL USA, INC. |
236 |
|
2018-05-08 |
|
| 301-235
| 6 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-05-22 |
|
| 301-235
| 7 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 301-235
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2019-02-19 |
|
| 301-235
| 9 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-238
| A |
TMHLMDTHDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-238
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
2001-12-21 |
|
| 301-238
| 1 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
2004-07-10 |
|
| 301-238
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-238
| 3 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-238
| 4 |
|
829J PAETEC ITEL, LLC |
236 |
|
2005-02-08 |
|
| 301-238
| 5 |
|
829J PAETEC ITEL, LLC |
236 |
|
2007-02-23 |
|
| 301-238
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-03-29 |
|
| 301-238
| 7 |
|
876D ONVOY, LLC - MD |
236 |
|
2016-03-30 |
|
| 301-238
| 8 |
|
876D ONVOY, LLC - MD |
236 |
|
2016-03-30 |
|
| 301-238
| 9 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-05-22 |
|
| 301-297
| A |
ALTWMDATRP0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 1 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 2 |
|
876D ONVOY, LLC - MD |
236 |
|
2025-01-09 |
|
| 301-297
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2021-04-02 |
|
| 301-297
| 4 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 5 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 6 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 7 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-297
| 9 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| A |
BRNDMDBERS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 1 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 3 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 4 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-03-29 |
|
| 301-372
| 5 |
|
829J PAETEC ITEL, LLC |
236 |
|
2016-06-17 |
|
| 301-372
| 6 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 7 |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
236 |
|
2014-06-25 |
|
| 301-372
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-372
| 9 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-05-22 |
|
| 301-719
| A |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-719
| 0 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2018-10-23 |
|
| 301-719
| 1 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-719
| 2 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-04-30 |
|
| 301-719
| 3 |
|
876D ONVOY, LLC - MD |
236 |
|
2020-04-30 |
|
| 301-719
| 4 |
|
624H ONVOY SPECTRUM, LLC |
236 |
|
2021-05-22 |
|
| 301-719
| 5 |
|
568G PEERLESS NETWORK OF MARYLAND, LLC |
236 |
|
2020-04-15 |
|
| 301-719
| 6 |
|
2593 CORE COMMUNICATIONS, INC.- MD |
236 |
|
2019-04-22 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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