Area code 307

{{short description|Area code for the US state of Wyoming}} {{Use mdy dates|date=February 2026}} {{Use American English|date=February 2026}} {{More citations needed|date=July 2025}} <imagemap> Image:Area_code_WY.png|right|Wyoming's numbering plan area and area code (blue) #poly 83 35 344 34 353 243 75 246 Area Code 397 poly 347 139 425 139 420 0 343 0 Area code 605 poly 348 139 429 139 420 243 352 243 Area code 308 poly 155 243 154 274 418 272 418 244 Area code 970 poly 77 192 1 192 1 273 152 273 154 244 72 244 Area code 435 poly 0 45 11 64 14 69 33 62 40 58 53 59 66 58 72 49 82 63 84 36 343 35 343 0 1 0 Area code 406 poly 0 44 10 63 15 68 32 65 39 59 52 59 64 59 72 49 81 59 78 192 0 192 Area codes 208 and 986 desc bottom-left </imagemap>

'''Area code 307''' is the telephone area code in the North American Numbering Plan for the entire U.S. state of Wyoming.<ref name=":0">{{Cite news |last=Culkin |first=Tommy |date=March 7, 2023 |title=Happy 307 Day: Wyoming’s lone area code explained |url=https://oilcity.news/statewide/2023/03/07/happy-307-day-wyomings-lone-area-code-explained/ |access-date=2025-07-23 |work=Oil City News}}</ref> It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947.<ref name=":0" />

Wyoming's sparse population has not required more than one area code for the state. As of May 2025, it was one of only eleven states with only one area code.{{Citation needed|date=July 2025}}

==Service area== The numbering plan area includes the following communities, with their respective central office codes: * Afton: 226, 248, 884, 885, 886, 887 * Albin: 246 * Alpine: 654, 656 * Baggs: 380, 383 * Basin: 440, 568 * Big Piney: 260, 276 * Buffalo: 217, 278, 425, 620, 621, 684, 719 * Burlington: 762 * Burns: 547 * Casper: 215, 224, 230, 232, 233, 234, 235, 236, 237, 243, 247, 251, 253, 258, 259, 261, 262, 265, 266, 267, 268, 277, 315, 333, 337, 377, 439, 441, 462, 472, 473, 577, 702, 724, 776, 797, 995 * Cheyenne: 214, 220, 221, 222, 256, 274, 275, 286, 287, 316, 317, 365, 369, 414, 421, 426, 432, 433, 443, 459, 475, 477, 509, 514, 529, 630, 631, 632, 633, 634, 635, 637, 638, 640, 650, 666, 701, 757, 771, 772, 773, 775, 777, 778, 823, 829, 920, 996 * Chugwater: 422 * Clearmont: 758 * Cody: 204, 213, 250, 272, 296, 527, 578, 586, 587, 712, 899 * Cokeville: 229, 270, 279, 600 * Douglas: 298, 351, 358, 359, 624, 717 * Dubois: 239, 450, 455 * East Thermopolis: 480, 722, 864, 921 * Encampment: 327 * Evanston: 255, 288, 313, 444, 497, 677, 679, 708, 783, 789, 799 * Frannie: 664 * Gas Hills: 457 * Gillette: 228, 257, 299, 363, 487, 567, 622, 660, 670, 680, 681, 682, 685, 686, 687, 688, 689, 696, 704 * Glendo: 735 * Glenrock: 309, 436, 554, 741 * Green River: 297, 364, 466, 707, 870, 871, 872, 875 * Greybull: 373, 765 * Guernsey: 836 * Hanna: 325, 339, 348 * Hulett: 467 * Jackson: 200, 201, 203, 249, 264, 413, 690, 699, 713, 730, 732, 733, 734, 739, 740, 774 * Kaycee: 738 * Kemmerer: 723, 727, 800, 828, 877 * La Barge: 386, 390 * La Grange: 409, 834 * Lander: 206, 330, 332, 335, 345, 349, 438, 488, 714 * Laramie: 223, 314, 343, 399, 460, 703, 721, 742, 745, 755, 760, 761, 766, 977 * Lingle: 205, 837 * Lovell: 548, 731 * Lusk: 216, 334, 340, 481, 759 * Lyman: 787 * Manila: 874 * Medicine Bow: 379, 404, 520 * Meeteetse,: 868 * Midwest: 437 * Moran: 541, 543, 999 * Moorcroft: 391, 756 * Mountain View: 747, 780, 782 * Newcastle: 465, 629, 744, 746, 941, 949 * Pine Bluffs: 245 * Pinedale: 231, 360, 367, 537, 749 * Powell: 202, 219, 254, 271, 716, 754, 764 * Rawlins: 320, 321, 324, 328, 370, 417, 710 * Riverton: 240, 463, 709, 840, 850, 851, 854, 855, 856, 857, 858 * Rock River: 378, 798 * Rock Springs: 209, 212, 252, 350, 352, 354, 362, 371, 382, 389, 448, 522, 705, 922 * Saratoga: 326, 329, 447 * Sheridan: 429, 461, 533, 655, 672, 673, 674, 675, 683, 706, 751, 752, 763 * Shoshoni: 728, 876 * Sundance: 281, 282, 283, 290, 790 * Ten Sleep: 366 * Thermopolis: 480, 722, 864, 921 * Torrington: 338, 401, 532, 534, 575, 715 * Upton: 468 * West Edgemont: 663 * West Lyman: 788 * Wheatland: 241, 269, 322, 331, 720, 779, 881 * Worland: 347, 375, 388, 431, 718 * Wright: 464, 939 * Premium calls (unassigned): 208, 211, 307, 308, 311, 406, 411, 470, 511, 536, 555, 558, 559, 605, 611, 700, 711, 725, 811, 911, 950, 958, 959, 970, 976

==References== {{reflist}}

==External links== {{Area_code_footer|Map=WY}}

{{Area code box| State = WY |width=100% |This = 307 | N = 406 | S = 435, 970 | W = 208/986, 406, 435 | E = 605, 308 | S1=CO | S2=UT | S3=ID | S4=MT | S5=SD | S6=NE }} {{Area code list}}{{Coord|43|00|N|107|30|W|type:admin1st_region:US-WY|display=title}}

307 307 Category:Telecommunications-related introductions in 1947