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307 Area Code

Area code 307 is in Wyoming (WY), USA and some of its main locations are Cheyenne, Casper, Laramie, etc. (jump to city list below).

Area code 307 has been in service since January 01, 1947.

05:45:50 AM is the current time in area code 307 (Mountain Time Zone).

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307 phone number location

NPANXX Area served1 Date2
307-200 Jackson 8/16/2002
307-201 Jackson 1/7/2003
307-202 Powell 1/21/2003
307-203 Jackson 3/14/2001
307-204 Cody 2/6/2018
307-205 Lingle 11/16/2016
307-206 Lander 12/5/2013
307-207 Lake 12/6/2018
307-209 Rock Springs 12/19/2014
307-210 Southeast Sheridan 4/3/2020
307-212 Rock Springs 7/16/2002
307-213 Cody 7/16/2002
307-214 Cheyenne 1/6/2003
307-215 Casper 7/26/2001
307-216 Lusk 10/9/2002
307-217 Buffalo 10/9/2002
307-218 Sheridan 8/13/2019
307-219 Powell 3/26/2015
307-220 Cheyenne N/A
307-221 Cheyenne N/A
307-222 Cheyenne N/A
307-223 Laramie N/A
307-224 Casper N/A
307-225 Laramie 9/2/2020
307-226 Afton 12/28/2015
307-227 Mammoth 9/19/2016
307-228 Gillette 5/23/2014
307-229 Cokeville 2/17/2015
307-230 Border 7/19/2022
307-231 Pinedale N/A
307-232 Casper N/A
307-233 Casper N/A
307-234 Casper N/A
307-235 Casper N/A
307-236 Burns 4/3/2020
307-237 Casper N/A
307-238 Hamilton Dome 8/22/2017
307-239 Dubois 11/5/2015
307-240 Riverton N/A
307-241 Wheatland N/A
307-242 Lake N/A
307-243 Casper N/A
307-244 Freedom 5/15/2019
307-245 Pinebluffs N/A
307-246 Albin N/A
307-247 Casper N/A
307-248 Afton 3/25/2003
307-249 Jackson 3/24/2017
307-250 Cody N/A
307-251 Casper 4/13/2006
307-252 Rock Springs N/A
307-253 Casper 3/10/2008
307-254 Powell 9/11/2003
307-255 Evanston 7/15/2002
307-256 Cheyenne 1/5/2004
307-257 Gillette 5/19/2004
307-258 Casper N/A
307-259 Casper N/A
307-260 Big Piney N/A
307-261 Casper N/A
307-262 Casper N/A
307-263 Cheyenne 10/16/2019
307-264 Jackson 3/24/2014
307-265 Casper N/A
307-266 Casper N/A
307-267 Casper N/A
307-268 Casper N/A
307-269 Wheatland N/A
307-270 Cokeville N/A
307-271 Powell 5/26/2004
307-272 Cody N/A
307-273 Farson N/A
307-274 Cheyenne 7/14/2004
307-275 Cheyenne 1/12/2005
307-276 Big Piney N/A
307-277 Casper 8/21/2003
307-278 Buffalo 5/19/2004
307-279 Cokeville N/A
307-280 Farson N/A
307-281 Sundance N/A
307-282 Sundance N/A
307-283 Sundance N/A
307-284 Jackson 11/20/2019
307-285 Buffalo 5/21/2020
307-286 Cheyenne 1/19/2004
307-287 Cheyenne 5/23/2006
307-288 Evanston 5/19/2004
307-290 Sundance N/A
307-291 Cody 10/28/2021
307-292 Cheyenne 6/17/2020
307-293 Guernsey 3/2/2021
307-296 Cody N/A
307-297 Green River N/A
307-298 Douglas 5/19/2004
307-299 Gillette 10/21/2003

NPANXX Area served1 Date2
307-300 Powell 10/10/2019
307-302 Cody 8/17/2020
307-303 Green River 11/9/2020
307-304 Jeffrey City 9/17/2020
307-305 Midwest 3/5/2021
307-306 Douglas 12/21/2020
307-309 Glenrock 9/8/2006
307-310 Cheyenne 10/23/2019
307-312 West Spearfish 6/19/2012
307-313 Evanston N/A
307-314 Laramie N/A
307-315 Casper 5/11/2007
307-316 Cheyenne 3/20/2006
307-317 Cheyenne 5/22/2017
307-318 Wright 1/15/2021
307-319 Shoshoni 9/17/2020
307-320 Rawlins N/A
307-321 Rawlins N/A
307-322 Wheatland N/A
307-323 Pinedale 7/22/2019
307-324 Rawlins N/A
307-325 Hanna N/A
307-326 Saratoga N/A
307-327 Encampment N/A
307-328 Rawlins N/A
307-329 Saratoga N/A
307-330 Lander N/A
307-331 Wheatland N/A
307-332 Lander N/A
307-333 Casper N/A
307-334 Lusk N/A
307-335 Lander N/A
307-336 Daniel 7/22/2019
307-337 Casper 1/7/2011
307-338 Torrington 1/12/2011
307-339 Hanna N/A
307-340 Lusk N/A
307-341 South Wyola N/A
307-342 Jackson N/A
307-343 Laramie 7/16/2009
307-344 Mammoth N/A
307-345 Lander N/A
307-346 Cheyenne 7/14/2021
307-347 Worland N/A
307-348 Hanna N/A
307-349 Lander N/A
307-350 Rock Springs N/A
307-351 Douglas N/A
307-352 Rock Springs N/A
307-353 Alta N/A
307-354 Rock Springs 3/27/2001
307-355 La Grange 7/29/2020
307-356 Shirley Basin N/A
307-358 Douglas N/A
307-359 Douglas N/A
307-360 Pinedale N/A
307-361 Baggs 3/5/2021
307-362 Rock Springs N/A
307-363 Gillette 8/30/2010
307-364 Green River 5/23/2014
307-365 Cheyenne 3/3/2008
307-366 Ten Sleep N/A
307-367 Pinedale N/A
307-368 Afton 2/10/2021
307-369 Cheyenne 1/10/2011
307-370 Rawlins N/A
307-371 Rock Springs N/A
307-372 Douglas 8/10/2020
307-373 Greybull N/A
307-374 Rock Springs 9/9/2021
307-375 Worland N/A
307-376 Alpine 8/11/2021
307-377 Casper N/A
307-378 Rock River N/A
307-379 Medicine Bow N/A
307-380 Baggs N/A
307-381 Sheridan 4/23/2021
307-382 Rock Springs N/A
307-383 Baggs N/A
307-384 Afton 11/3/2021
307-386 Labarge N/A
307-387 Gillette 10/1/2021
307-388 Worland N/A
307-389 Rock Springs N/A
307-390 Labarge N/A
307-391 Moorcroft 3/14/2005
307-392 Border 6/21/2006
307-393 Evanston 3/31/2021
307-394 Casper 5/21/2021
307-395 Laramie 8/11/2021
307-396 Green River 10/20/2021
307-397 Hanna 11/5/2021
307-398 Labarge 11/5/2021
307-399 Laramie 5/16/2002

NPANXX Area served1 Date2
307-400 Cheyenne 1/24/2020
307-401 Torrington N/A
307-402 Mt View 11/5/2021
307-403 Moran 2/22/2022
307-404 Medicine Bow 5/23/2018
307-407 West Spearfish 8/10/2020
307-408 Lyman 11/5/2021
307-409 La Grange 2/20/2018
307-410 Powell 3/22/2022
307-412 Laramie 9/23/2022
307-413 Jackson 1/29/2001
307-414 Cheyenne 8/24/2015
307-417 Rawlins N/A
307-419 Cody 3/24/2022
307-421 Cheyenne N/A
307-422 Chugwater N/A
307-423 Buffalo 11/5/2021
307-425 Buffalo 3/30/2011
307-426 Cheyenne 5/22/2007
307-429 Sheridan 5/23/2013
307-431 Worland N/A
307-432 Cheyenne N/A
307-433 Cheyenne N/A
307-436 Glenrock N/A
307-437 Midwest N/A
307-438 Lander 6/19/2007
307-439 Casper N/A
307-440 Basin N/A
307-441 Casper N/A
307-443 Cheyenne 6/18/2019
307-444 Evanston N/A
307-445 Kemmerer 2/5/2021
307-447 Saratoga 10/8/2015
307-448 Rock Springs 5/12/2011
307-450 Dubois N/A
307-455 Dubois N/A
307-456 Big Piney 7/22/2019
307-457 Gas Hills N/A
307-458 Casper 12/10/2021
307-459 Cheyenne 6/11/2002
307-460 Laramie 6/11/2002
307-461 Sheridan 6/11/2002
307-462 Casper 6/11/2002
307-463 Riverton 6/11/2002
307-464 Wright N/A
307-465 Newcastle N/A
307-466 Green River N/A
307-467 Hulett N/A
307-468 Upton N/A
307-469 Hyattville N/A
307-472 Casper N/A
307-473 Casper N/A
307-475 Cheyenne 12/21/2016
307-477 Cheyenne N/A
307-480 Thermopolis 6/15/2005
307-481 Lusk 3/14/2007
307-486 Crowheart N/A
307-487 Gillette 10/9/2018
307-488 Lander 4/19/2018
307-489 Shirley Basin 5/30/2018
307-497 Evanston N/A

NPANXX Area served1 Date2
307-500 Border 2/5/2021
307-509 Cheyenne 9/5/2008
307-514 Cheyenne N/A
307-520 Medicine Bow N/A
307-522 Rock Springs 8/7/2017
307-527 Cody N/A
307-529 Cheyenne 8/25/2009
307-532 Torrington N/A
307-533 Sheridan N/A
307-534 Torrington N/A
307-537 Pinedale N/A
307-540 Jeffrey City N/A
307-541 Moran N/A
307-543 Moran N/A
307-544 Jeffrey City N/A
307-545 Oldfathful N/A
307-547 Burns N/A
307-548 Lovell N/A
307-549 Oldfathful N/A
307-554 Glenrock N/A
307-556 Riverton 2/5/2021
307-567 Gillette N/A
307-568 Basin N/A
307-575 Torrington 6/28/2002
307-576 Leigh Canyon N/A
307-577 Casper N/A
307-578 Cody N/A
307-586 Cody 4/1/2005
307-587 Cody N/A

NPANXX Area served1 Date2
307-600 Cokeville N/A
307-620 Buffalo N/A
307-621 Buffalo N/A
307-622 Gillette 11/24/2010
307-624 Douglas 10/3/2001
307-629 Newcastle 12/21/2004
307-630 Cheyenne N/A
307-631 Cheyenne N/A
307-632 Cheyenne N/A
307-633 Cheyenne N/A
307-634 Cheyenne N/A
307-635 Cheyenne N/A
307-637 Cheyenne N/A
307-638 Cheyenne N/A
307-640 Cheyenne N/A
307-643 West Spearfish N/A
307-645 Clark N/A
307-649 Carpenter N/A
307-650 Cheyenne N/A
307-654 Alpine N/A
307-655 Sheridan N/A
307-656 Alpine 3/22/2007
307-660 Gillette N/A
307-663 West Edgemont N/A
307-664 Frannie N/A
307-666 Cheyenne 5/23/2019
307-667 Rawlins 2/28/2021
307-670 Gillette N/A
307-672 Sheridan N/A
307-673 Sheridan N/A
307-674 Sheridan N/A
307-675 Sheridan 1/30/2003
307-677 Evanston N/A
307-679 Evanston N/A
307-680 Gillette N/A
307-681 Gillette 4/16/2010
307-682 Gillette N/A
307-683 Sheridan N/A
307-684 Buffalo N/A
307-685 Gillette N/A
307-686 Gillette N/A
307-687 Gillette N/A
307-688 Gillette 5/24/2004
307-689 Gillette N/A
307-690 Jackson N/A
307-696 Gillette 9/22/2008
307-699 Jackson N/A
NPANXX Area served1 Date2
307-701 Cheyenne 12/27/2002
307-702 Casper 12/27/2002
307-703 Laramie 12/27/2002
307-704 Gillette 12/27/2002
307-705 Rock Springs 6/16/2003
307-706 Sheridan 12/27/2002
307-707 Green River 6/26/2003
307-708 Evanston 6/16/2003
307-709 Riverton 6/16/2003
307-710 Rawlins 6/16/2003
307-712 Cody 12/27/2002
307-713 Jackson 6/16/2003
307-714 Lander 6/16/2003
307-715 Torrington 12/27/2002
307-716 Powell 12/27/2002
307-717 Douglas 12/27/2002
307-718 Worland 12/27/2002
307-719 Buffalo 12/27/2002
307-720 Wheatland 12/27/2002
307-721 Laramie N/A
307-722 Thermopolis 12/27/2002
307-723 Kemmerer 6/16/2003
307-724 Casper 6/16/2003
307-727 Kemmerer N/A
307-728 Shoshoni N/A
307-730 Jackson N/A
307-731 Lovell 12/27/2002
307-732 Jackson N/A
307-733 Jackson N/A
307-734 Jackson N/A
307-735 Glendo N/A
307-736 Arvada N/A
307-737 Southeast Sheridan N/A
307-738 Kaycee N/A
307-739 Jackson N/A
307-740 Jackson N/A
307-741 Glenrock 12/27/2002
307-742 Laramie N/A
307-744 Newcastle 12/27/2002
307-745 Laramie N/A
307-746 Newcastle N/A
307-747 Mt View 6/16/2003
307-749 Pinedale 10/20/2003
307-750 Decker N/A
307-751 Sheridan N/A
307-752 Sheridan N/A
307-754 Powell N/A
307-755 Laramie N/A
307-756 Moorcroft N/A
307-757 Cheyenne N/A
307-758 Clearmont N/A
307-759 Lusk 10/20/2003
307-760 Laramie N/A
307-761 Laramie N/A
307-762 Burlington N/A
307-763 Sheridan N/A
307-764 Powell 4/1/2005
307-765 Greybull N/A
307-766 Laramie N/A
307-770 Farson 5/7/2020
307-771 Cheyenne N/A
307-772 Cheyenne N/A
307-773 Cheyenne N/A
307-774 Jackson 6/22/2005
307-775 Cheyenne N/A
307-776 Casper 3/9/2018
307-777 Cheyenne N/A
307-778 Cheyenne N/A
307-779 Wheatland 10/20/2003
307-780 Mt View N/A
307-782 Mt View N/A
307-783 Evanston N/A
307-785 West Bell Fourche 4/19/2017
307-786 Urie N/A
307-787 Lyman N/A
307-788 West Lyman N/A
307-789 Evanston N/A
307-790 Sundance 12/18/2003
307-797 Casper 10/3/2001
307-798 Rock River 11/6/2007
307-799 Evanston N/A
NPANXX Area served1 Date2
307-800 Kemmerer 11/19/2012
307-823 Cheyenne 8/1/2012
307-828 Kemmerer N/A
307-829 Cheyenne 11/21/2014
307-834 La Grange N/A
307-836 Guernsey N/A
307-837 Lingle N/A
307-840 Riverton N/A
307-849 Border N/A
307-850 Riverton N/A
307-851 Riverton N/A
307-854 Riverton 12/10/2007
307-855 Riverton N/A
307-856 Riverton N/A
307-857 Riverton N/A
307-858 Riverton N/A
307-859 Daniel N/A
307-864 Thermopolis N/A
307-867 Hamilton Dome N/A
307-868 Meeteetse N/A
307-870 Green River N/A
307-871 Green River N/A
307-872 Green River N/A
307-874 Manila N/A
307-875 Green River N/A
307-876 Shoshoni N/A
307-877 Kemmerer N/A
307-878 South Alzada N/A
307-880 Freedom 6/22/2005
307-881 Wheatland 11/21/2014
307-883 Freedom N/A
307-884 Afton N/A
307-885 Afton N/A
307-886 Afton N/A
307-887 Afton 6/22/2005
307-888 Oldfathful 2/22/2017
307-890 Freedom N/A
307-895 Cheyenne 3/31/2022
307-896 West Bell Fourche N/A
307-899 Cody N/A

NPANXX Area served1 Date2
307-900 Glendo 6/10/2020
307-910 Cheyenne 4/23/2021
307-920 Cheyenne N/A
307-921 Thermopolis N/A
307-922 Rock Springs N/A
307-939 Wright N/A
307-941 Newcastle N/A
307-949 Newcastle N/A
307-977 Laramie N/A
307-995 Casper N/A
307-996 Cheyenne N/A
307-999 Moran 2/28/2017
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date. N/A - mostly CO codes assigned before 2001.
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Cities in area code 307

City1 County Time2
Afton Lincoln M
Aladdin Crook M
Albin Laramie M
Alcova Natrona M
Alpine Lincoln M
Alva Crook M
Arapahoe Fremont M
Arminto Natrona M
Arvada Sheridan M
Auburn Lincoln M
Baggs Carbon M
Bairoil Sweetwater M
Banner Sheridan M
Basin Big Horn M
Bedford Lincoln M
Beulah Crook M
Big Horn Sheridan M
Big Piney Sublette M
Bondurant Sublette M
Bosler Albany M
Boulder Sublette M
Buffalo Johnson M
Buford Albany M
Burlington Big Horn M
Burns Laramie M
Byron Big Horn M
Carpenter Laramie M
Casper Natrona M
Centennial Albany M
Cheyenne Laramie M
Chugwater Platte M
Clearmont Sheridan M
Cody Park M
Cokeville Lincoln M
Cora Sublette M
Cowley Big Horn M
Crowheart Fremont M
Daniel Sublette M
Dayton Sheridan M
Deaver Big Horn M
Devils Tower Crook M
Diamondville Lincoln M
Dixon Carbon M
Douglas Converse M
Dubois Fremont M
Edgerton Natrona M
Elk Mountain Carbon M
Emblem Big Horn M
Encampment Carbon M
Etna Lincoln M
Evanston Uinta M
Evansville Natrona M
Fairview Lincoln M
Farson Sweetwater M
Fe Warren Afb Laramie M
Fort Bridger Uinta M
Fort Laramie Goshen M
Fort Washakie Fremont M
Four Corners Weston M
Frannie Park M
Freedom Lincoln M
Frontier Lincoln M
Garrett Albany M
Gillette Campbell M
Glendo Platte M
Glenrock Converse M
Granger Sweetwater M
Granite Canon Laramie M
Green River Sweetwater M
Greybull Big Horn M
Grover Lincoln M
Guernsey Platte M
Hanna Carbon M
Hartville Platte M
Hawk Springs Goshen M
Hiland Natrona M
Hillsdale Laramie M
Horse Creek Laramie M
Hudson Fremont M
Hulett Crook M
Huntley Goshen M
Hyattville Big Horn M
Jackson Teton M
Jay Em Goshen M
Jeffrey City Fremont M
Jelm Albany M
Kaycee Johnson M
Kelly Teton M
Kemmerer Lincoln M
Kinnear Fremont M
Kirby Hot Springs M
La Barge Lincoln M
Lagrange Goshen M
Lance Creek Niobrara M
Lander Fremont M
Laramie Albany M
Leiter Sheridan M
Linch Johnson M
Lingle Goshen M
Little America Sweetwater M
Lonetree Uinta M
Lost Springs Converse M
Lovell Big Horn M
Lusk Niobrara M
Lyman Uinta M
Lysite Fremont M
Manderson Big Horn M
Manville Niobrara M
Mc Kinnon Sweetwater M
Medicine Bow Carbon M
Meeteetse Park M
Meriden Laramie M
Midwest Natrona M
Mills Natrona M
Moorcroft Crook M
Moose Teton M
Moran Teton M
Mountain View Uinta M
Natrona Natrona M
Newcastle Weston M
Opal Lincoln M
Osage Weston M
Otto Big Horn M
Parkman Sheridan M
Pavillion Fremont M
Pine Bluffs Laramie M
Pinedale Sublette M
Point Of Rocks Sweetwater M
Powder River Natrona M
Powell Park M
Ralston Park M
Ranchester Sheridan M
Rawlins Carbon M
Recluse Campbell M
Reliance Sweetwater M
Riverton Fremont M
Robertson Uinta M
Rock River Albany M
Rock Springs Sweetwater M
Rozet Campbell M
Saddlestring Johnson M
Saratoga Carbon M
Savery Carbon M
Shawnee Converse M
Shell Big Horn M
Sheridan Sheridan M
Shirley Basin Carbon M
Shoshoni Fremont M
Sinclair Carbon M
Smoot Lincoln M
St Stephens Fremont M
Story Sheridan M
Sundance Crook M
Superior Sweetwater M
Ten Sleep Washakie M
Teton Village Teton M
Thayne Lincoln M
Thermopolis Hot Springs M
Tie Siding Albany M
Torrington Goshen M
Upton Weston M
Van Tassell Niobrara M
Veteran Goshen M
Walcott Carbon M
Wamsutter Sweetwater M
Wapiti Park M
Weston Campbell M
Wheatland Platte M
Wilson Teton M
Wolf Sheridan M
Worland Washakie M
Wright Campbell M
Wyarno Sheridan M
Yellowstone National Park Park M
Yoder Goshen M
  1. Listed above are most places served by area code 307. When multiple places in a state/province share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. M stands for Mountain Time Zone (currently 05:45:50 AM).
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