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(406)
Enter 7-digit phone number for area code 406 or the complete 10-digit phone number

Phone Prefixes for Area Code 406

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Area code location Company / Service Provider
406-414 BOZEMAN, MT QWEST CORPORATION
406-415 DEER LODGE, MT BRESNAN BROADBAND OF MONTANA, LLC - MT (CHARTER)
406-417 HELENA, MT NEW CINGULAR WIRELESS PCS, LLC
406-420 BIGFORK, MT BRESNAN BROADBAND OF MONTANA, LLC - MT (CHARTER)
406-421 South Miles City, MT RANGE TELEPHONE COOPERATIVE, INC.
406-422 HELENA, MT BRESNAN BROADBAND OF MONTANA, LLC - MT (CHARTER)
406-423 HOBSON, MT CENTRAL MONTANA COMMUNICATIONS, INC.
406-424 SHELBY, MT 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT
406-425 RED LODGE, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-426 RED LODGE, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-427 SO BROADUS, MT RANGE TELEPHONE COOPERATIVE, INC.
406-428 GRASSRANGE, MT MID-RIVERS TELEPHONE COOPERATIVE, INC.
406-429 WINNETT, MT MID-RIVERS TELEPHONE COOPERATIVE, INC.
406-430 HELENA, MT ONVOY, LLC - MT
406-431 HELENA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-432 DEVON, MT NORTHERN TELEPHONE COOPERATIVE, INC.
406-433 SIDNEY, MT MID-RIVERS TELEPHONE COOPERATIVE, INC.
406-434 SHELBY, MT QWEST CORPORATION
406-435 BILLINGS, MT ONE EIGHTY COMMUNICATIONS, INC. - MT
406-436 BROADUS, MT RANGE TELEPHONE COOPERATIVE, INC.
406-437 HELENA, MT MCIMETRO ACCESS TRANSMISSION SERVICES LLC
406-438 HELENA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-439 HELENA, MT NEW CINGULAR WIRELESS PCS, LLC
406-440 HELENA, MT 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT
406-441 HELENA, MT QWEST CORPORATION
406-442 HELENA, MT QWEST CORPORATION
406-443 HELENA, MT QWEST CORPORATION
406-444 HELENA, MT QWEST CORPORATION
406-445 RED LODGE, MT QWEST CORPORATION
406-446 RED LODGE, MT QWEST CORPORATION
406-447 HELENA, MT QWEST CORPORATION
406-448 NO POPLAR, MT NEMONT TELEPHONE COOPERATIVE, INC.
406-449 HELENA, MT QWEST CORPORATION
406-450 SHELBY, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-451 BOZEMAN, MT SPRINT SPECTRUM L.P.- MT
406-452 Great Falls, MT QWEST CORPORATION
406-453 Great Falls, MT QWEST CORPORATION
406-454 Great Falls, MT QWEST CORPORATION
406-455 Great Falls, MT QWEST CORPORATION
406-456 SO CHESTER, MT TRIANGLE TELEPHONE COOPERATIVE ASSN., INC.
406-457 HELENA, MT QWEST CORPORATION
406-458 HELENA, MT QWEST CORPORATION
406-459 HELENA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-460 SHELBY, MT NEW CINGULAR WIRELESS PCS, LLC
406-461 HELENA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-462 WINIFRED, MT TRIANGLE TELEPHONE COOPERATIVE ASSN., INC.
406-463 POWER, MT 3 RIVERS TELEPHONE COOPERATIVE, INC.
406-464 ROY, MT MID-RIVERS TELEPHONE COOPERATIVE, INC.
406-465 HELENA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-466 CHOTEAU, MT 3 RIVERS TELEPHONE COOPERATIVE, INC.
New numbers being added to 406 area code
Effective: 06/18/2017
406-400 in HAVRE, MT
TRIANGLE COMMUNICATION SYSTEM, INC. - MT
Effective: 06/21/2017
406-412 in BILLINGS, MT
NEUTRAL TANDEM-MONTANA, LLC - MT
406 Area Code Information
Type of code: General Purpose Code
location: MT - US
Time zone: M
Assigned for use: Yes
Code in service: Yes
Service date: January 01, 1947
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s):
Overlay code: No
Overlay complex:
Dialing plan Standard Permissive
Home local calls: 7D NA
Foreign local calls: 7D NA
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -
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