Area code 307
Area code 307 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Wyoming. It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947. Because it is sparsely populated, Wyoming is one of only eleven states (as of April 8, 2020) with only one area code. Service area The numbering plan 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,