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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 01:28:15 AM (Mountain Time Zone).

307 area code location on a map

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

Reverse phone lookup

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

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.
Assignment date. N/A - mostly central office codes assigned before 2001.

Top

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

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.
M stands for Mountain Time Zone (currently 01:28:15 AM).

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