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Area Code 307

Area code 307 is in Wyoming, USA , spanning 23 counties and serving 175 cities, including Cheyenne, Casper or Laramie; it currently uses 476 prefixes, assigned from 307-200-XXXX through 307-999-XXXX.

In service date for area code 307: January 01, 1947.

The current local time is .

307 area code location on a map

© OpenStreetMap contributors
For exact boundaries see official 307 area code map

Reverse phone lookup

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Locate any 307-NXX prefix:

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
307-289 Cheyenne 04/14/2023
307-290 Sundance N/A
307-291 Cody 10/28/2021
307-292 Cheyenne 6/17/2020
307-293 Guernsey 3/2/2021
307-294 Big Piney 08/01/2023
307-295 Torrington 09/13/2023
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
307-301 Casper 10/09/2023
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
307-357 Laramie 10/01/2023
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
307-405 West Bell Fourche 05/24/2023
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
307-415 Cheyenne 03/03/2023
307-416 Pinedale 05/24/2023
307-417 Rawlins N/A
307-418 Jackson 06/09/2023
307-419 Cody 3/24/2022
307-420 Lingle 05/24/2023
307-421 Cheyenne N/A
307-422 Chugwater N/A
307-423 Buffalo 11/5/2021
307-424 Lake 05/24/2023
307-425 Buffalo 3/30/2011
307-426 Cheyenne 5/22/2007
307-427 Mammoth 05/24/2023
307-428 Douglas 12/01/2023
307-429 Sheridan 5/23/2013
307-430 Old Faithful 12/11/2023
307-431 Worland N/A
307-432 Cheyenne N/A
307-433 Cheyenne N/A
307-434 Gillette 02/05/2024
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
307-446 West Spearfish 05/24/2023
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 Old Faithful N/A
307-547 Burns N/A
307-548 Lovell N/A
307-549 Old Faithful 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 Old Faithful 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
307-990 Lander 04/04/2023
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 central office 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 USA area code 307. When multiple places in a US state 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 ).
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