Area code 406 is the telephone area code serving all of the state of Montana.

Contents 1 Exchanges in area code 406 2 Use by Google 3 References 4 See also

[edit] Exchanges in area code 406

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• Billings: 206, 208, 215, 237, 238, 245, 247, 248, 252, 254, 255, 256, 259, 272, 281, 294, 325, 371, 373, 384, 435, 520, 534, 545, 591, 598, 600, 620, 651, 652, 655, 656, 657, 661, 670, 671, 672, 690, 694, 696, 697, 698, 729, 794, 839, 850, 851, 855, 860, 861, 867, 869, 894, 896, 999
• Bozeman and Gallatin Valley: 209, 219, 282, 284, 285, 388, 451, 522, 539, 548, 551, 556, 557, 570, 577, 581, 582, 585, 586, 587, 624 (Bresnan cable VOIP), 763, 920, 922, 994
• Butte: 221, 299, 310, 490, 491, 494, 496, 533, 565, 595, 723, 782, 792
• Great Falls: 205, 216, 217, 231, 268, 403, 424, 425, 452, 453, 454, 455, 564, 590, 727, 731, 750, 760, 761, 770, 771, 781, 788, 791, 799, 836, 866, 868, 970, 899, 923, 952
• Helena: 202, 204, 225, 227, 235, 266, 324, 362, 410, 422, 430, 431, 437, 438, 439, 441, 442, 443, 444, 449, 457, 458, 461, 465, 475, 492, 495, 547, 562, 594, 634, 667, 841, 846, 871, 932, 933
• Kalispell: 758, 755, 752, 751, 250, 257, 270

[edit] Use by Google

On December 10, 2008, Google's Gmail Blog announced that SMS messages could be sent from inside Gmail. The messages are sent from numbers in the 406 area code. Each number is unique and can be bookmarked in your phone for replies or future use.^[1]

Google also employs the use of area code 406 for the assignment of reply-to or callback numbers for Google Voice's customers' contacts.

[edit] References

1. ^ http://gmailblog.blogspot.com/2008/12/really-new-in-labs-this-time-sms-text.html

[edit] See also

• NANPA Area Code Map of Montana
• List of exchanges from AreaCodeDownload.com, 406 Area Code

State of Montana area code: 406
	North: 403/587, 250/778, 306
West: 208	406	East: 605, 701
	South: 208, 307
Province of Alberta Area codes: 403, 587, 780
Province of British Columbia Area Codes: 250, 604, 778
State of Idaho Area Code: 208
State of North Dakota area code: 701
State of South Dakota area code: 605
State of Wyoming area code: 307

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