× (406)
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Phone Prefixes for 406 Area Code

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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: 11/15/2017
406-402 in GREAT FALLS, MT
T-MOBILE USA, INC.
Effective: 11/01/2017
406-561 in BILLINGS, MT
T-MOBILE USA, INC.
Effective: 09/01/2017
406-940 in MOLT, MT
NEW CINGULAR WIRELESS PCS, LLC
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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