Local Calling Guide
Area code/prefix search
Washington Zone 10, MD
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 301-610
| 4 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-610
| 5 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-610
| 6 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-610
| 7 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-610
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-610
| 9 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-637
| A |
MCLNVA23DS4 |
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 301-637
| 0 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2004-12-13 |
|
| 301-637
| 1 |
|
829J PAETEC ITEL, LLC |
236 |
|
2005-12-15 |
|
| 301-637
| 2 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-04-07 |
|
| 301-637
| 3 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-04-07 |
|
| 301-637
| 4 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
|
|
| 301-637
| 5 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-04-03 |
|
| 301-637
| 6 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-04-03 |
|
| 301-637
| 7 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2005-04-03 |
|
| 301-637
| 8 |
|
6119 LEVEL 3 COMMUNICATIONS, LLC - MD |
236 |
|
2006-06-17 |
|
| 301-637
| 9 |
|
318J COMCAST IP PHONE, LLC |
236 |
|
2010-10-11 |
|
| 301-640
| A |
GTBGMDGBPS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-640
| 0 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2013-05-20 |
|
| 301-640
| 1 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2007-06-16 |
|
| 301-640
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-640
| 3 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-640
| 4 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-640
| 5 |
|
876D ONVOY, LLC - MD |
236 |
|
2012-09-06 |
|
| 301-640
| 6 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2007-08-17 |
|
| 301-640
| 7 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-640
| 8 |
|
5562 METROPCS, INC. |
236 |
|
2013-08-06 |
|
| 301-640
| 9 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2013-05-20 |
|
| 301-670
| A |
GTBGMDGBPS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-721
| A |
GTBGMDGBPS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-738
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-762
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| A |
BTHSMDBDDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 1 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 3 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 4 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-11-15 |
|
| 301-765
| 5 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 6 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 7 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-765
| 9 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-795
| A |
WASHDCINDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-795
| 0 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-795
| 1 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-795
| 2 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-795
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-795
| 4 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
2008-02-08 |
|
| 301-795
| 5 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2008-11-15 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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