National Phone Number Registry NPNR

Area Code 406 Location

Area code 406 is currently assigned for use in Montana since Jan 01, 1947. View all phone prefixes used in area code 406 or other area codes in Montana.

(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
406-200 BILLINGS, MT TELEPORT COMMUNICATIONS AMERICA - MT - LLC
406-201 FORSYTH, MT NEW CINGULAR WIRELESS PCS, LLC
406-202 HELENA, MT NEW CINGULAR WIRELESS PCS, LLC
406-203 MISSOULA, MT LEVEL 3 COMMUNICATIONS, LLC - MT
406-204 HELENA, MT LEVEL 3 COMMUNICATIONS, LLC - MT
406-205 Great Falls, MT LEVEL 3 COMMUNICATIONS, LLC - MT
406-206 BILLINGS, MT LEVEL 3 COMMUNICATIONS, LLC - MT
406-207 MISSOULA, MT NEW CINGULAR WIRELESS PCS, LLC
406-208 BILLINGS, MT NEW CINGULAR WIRELESS PCS, LLC
406-209 BOZEMAN, MT NEW CINGULAR WIRELESS PCS, LLC
406-210 SEELEYLAKE, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-212 KALISPELL, MT NEW CINGULAR WIRELESS PCS, LLC
406-213 COLSTRIP, MT LEVEL 3 COMMUNICATIONS, LLC - MT
406-214 MISSOULA, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-215 MISSOULA, MT ELTOPIA COMMUNICATIONS, LLC - MT
406-216 Great Falls, MT 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT
406-217 Great Falls, MT AT&T LOCAL
406-218 MISSOULA, MT SPRINT SPECTRUM L.P.- MT
406-219 BOZEMAN, MT AT&T LOCAL
406-220 LIVINGSTON, MT NEW CINGULAR WIRELESS PCS, LLC
406-221 BUTTE, MT AT&T LOCAL
406-222 LIVINGSTON, MT QWEST CORPORATION
406-223 LIVINGSTON, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-224 LIVINGSTON, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-225 BOULDER, MT QWEST CORPORATION
406-226 EGLACIERPK, MT QWEST CORPORATION
406-227 HELENA, MT QWEST CORPORATION
406-228 GLASGOW, MT NEMONT TELEPHONE COOPERATIVE, INC.
406-229 CUT BANK, MT NEW CINGULAR WIRELESS PCS, LLC
406-230 GLASGOW, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-231 Great Falls, MT NEW CINGULAR WIRELESS PCS, LLC
406-232 MILES CITY, MT QWEST CORPORATION
406-233 MILES CITY, MT QWEST CORPORATION
406-234 MILES CITY, MT MID-RIVERS TELEPHONE COOPERATIVE, INC.
406-235 WOLF CREEK, MT QWEST CORPORATION
406-236 NEIHART, MT 3 RIVERS TELEPHONE COOPERATIVE, INC.
406-237 BILLINGS, MT QWEST CORPORATION
406-238 BILLINGS, MT QWEST CORPORATION
406-239 MISSOULA, MT NEW CINGULAR WIRELESS PCS, LLC
406-240 MISSOULA, MT NEW CINGULAR WIRELESS PCS, LLC
406-241 MISSOULA, MT NEW CINGULAR WIRELESS PCS, LLC
406-242 THOMPSNFLS, MT NEW CINGULAR WIRELESS PCS, LLC
406-243 MISSOULA, MT QWEST CORPORATION
406-244 POTOMAC, MT BLACKFOOT TELEPHONE COOPERATIVE, INC.
406-245 BILLINGS, MT QWEST CORPORATION
406-246 DIXON, MT BLACKFOOT TELEPHONE COOPERATIVE, INC.
406-247 BILLINGS, MT QWEST CORPORATION
406-248 BILLINGS, MT QWEST CORPORATION
406-249 KALISPELL, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
406-250 KALISPELL, MT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT
New numbers being added to 406 area code
Effective: 06/18/2017
406-400 in HAVRE, MT
TRIANGLE COMMUNICATION SYSTEM, INC. - MT
Effective: 05/04/2017
406-510 in MISSOULA, MT
NEUTRAL TANDEM-MONTANA, LLC - MT
Effective: 05/25/2017
406-916 in HELENA, MT
T-MOBILE USA, INC.
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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