Local Calling Guide
Area code/prefix search
Washington Zone 10, MD
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 301-284
| 9 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-294
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-296
| A |
WASKDCFNPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 0 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 1 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 2 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 4 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 5 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 6 |
|
318J COMCAST IP PHONE, LLC |
236 |
|
2013-08-01 |
|
| 301-296
| 7 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 8 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-296
| 9 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
236 |
|
|
|
| 301-299
| A |
BTHSMDBDDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 0 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 1 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 2 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 3 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 4 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 5 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 6 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 7 |
|
6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
236 |
|
2021-08-20 |
|
| 301-309
| 8 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-309
| 9 |
|
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-315
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-339
| A |
|
829J PAETEC ITEL, LLC |
236 |
|
2025-04-02 |
|
| 301-339
| 0 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 301-339
| 1 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 301-339
| 2 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 301-339
| 3 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2006-12-15 |
|
| 301-339
| 4 |
|
6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
236 |
|
2006-10-30 |
|
| 301-339
| 5 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 301-339
| 6 |
|
7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
236 |
|
2012-03-02 |
|
| 301-339
| 7 |
|
829J PAETEC ITEL, LLC |
236 |
|
2006-12-21 |
|
| 301-339
| 8 |
|
318J COMCAST IP PHONE, LLC |
236 |
|
2012-12-01 |
|
| 301-339
| 9 |
|
829J PAETEC ITEL, LLC |
236 |
|
|
|
| 301-340
| A |
RKVLMDRVDS1 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-353
| A |
GMTWMDGNDS0 |
9212 VERIZON MARYLAND, INC. |
236 |
|
|
|
| 301-354
| A |
WASHDCTTDS0 |
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 0 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 1 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 2 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 3 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 4 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 5 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 6 |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
236 |
|
2013-10-01 |
|
| 301-354
| 7 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 8 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
| 301-354
| 9 |
|
7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
236 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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