Area code 307
Area code for the US state of Wyoming
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Area code 307 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Wyoming.[1] It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947.[1]

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]
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