Wyoming This is a complete list of our dial-up numbers in Wyoming. Keep in mind that the ultimate deciding factor in determining if a dial-up number is local call for you is your local calling plan. If you have any questions, please call your local telephone company. To narrow your search, please select an area code below. 307 Return to the Top Area Code 307 Location Access Number Border (307) 849-0115 Buffalo (307) 684-4505 Casper (307) 462-4012 Cheyenne (307) 459-4012 Cody (307) 213-4045 Douglas (307) 358-6111 Evanston (307) 783-3465 Gillette (307) 685-8365 Green River (307) 875-8295 Jackson (307) 200-4011 Kemmerer (307) 877-3506 Laramie (307) 460-4009 Rawlins (307) 324-9265 Riverton (307) 463-4020 Rock Springs (307) 212-4010 Sheridan (307) 461-4022 Wheatland (307) 322-6465