307 Area Code

The 307 area code is part of the North American Numbering Plan (NANP) and serves the entire state of Wyoming, USA. Established in 1947 as one of the original area codes, 307 has the distinction of covering an entire state, making it one of the least densely populated numbering plan areas in the country. It provides telephone service for residents, businesses, and government offices throughout Wyoming.

Understanding the 307 Area Code

The 307 area code encompasses all cities, towns, and rural areas in Wyoming. Major cities include Cheyenne, Casper, Laramie, Gillette, Rock Springs, Sheridan, and Jackson. The code is used for landlines, mobile phones, VoIP services, and business telecommunications. Due to the small population density, 307 has not required an overlay and 7-digit local dialing remains common.

307 Area Code Map and Geographic Location

The 307 area code map covers the entire state of Wyoming, from the western mountains near Jackson and Yellowstone National Park to the eastern plains near Cheyenne. It includes urban centers, suburban communities, and extensive rural and wilderness areas. Wyoming is in the Mountain Time Zone.

All Major Cities and Regions in the 307 Area Code

Cheyenne
Casper
Laramie
Gillette
Rock Springs
Sheridan
Jackson
Rawlins
Riverton

Counties Covered by the 307 Area Code

Albany County
Big Horn County
Campbell County
Carbon County
Converse County
Goshen County
Hot Springs County
Johnson County
Laramie County
Lincoln County
Natrona County
Platte County
Sweetwater County
Teton County
Uinta County
Washakie County
Weston County

ZIP Codes within the 307 Telephone Zone (Examples)

82001 - Cheyenne
82601 - Casper
82070 - Laramie
82716 - Gillette
82901 - Rock Springs
82801 - Sheridan
83001 - Jackson
82301 - Rawlins
82501 - Riverton

Time Zone

The 307 area code is located in the Mountain Time Zone (MT), observing Mountain Standard Time (MST, UTC-7) in winter and Mountain Daylight Time (MDT, UTC-6) during daylight saving time.

Dialing, Phone & Service Details

Local dialing: 7-digit dialing is typically used for local calls within the same area code.
Long-distance calls within the USA: Dial 1 + 307 + 7-digit number.
International calls: Dial your country�s exit code + 1 + 307 + 7-digit number.
Services: The 307 area code supports landlines, mobile phones, VoIP, and business telecommunication services.

Why the 307 Area Code Matters

The 307 area code is essential to Wyoming�s identity, covering the entire state. It supports government services, energy and mining industries, tourism (including Yellowstone and Grand Teton National Parks), and educational institutions. Because it is unique to Wyoming, it is widely recognized and carries regional significance.

What area code is 307? / Where's area code 307?

What area code is 307? � 307 is the telephone area code serving the entire state of Wyoming, including Cheyenne, Casper, Laramie, and Jackson.

Where's area code 307? � It is located in Wyoming, USA, covering all cities, towns, and rural areas within the state.

Frequently Asked Questions (FAQ) about 307 Area Code

What is the 307 area code?

307 serves the entire state of Wyoming, including major cities such as Cheyenne, Casper, Laramie, and Jackson.

When was the 307 area code created?

It was established in 1947 as one of the original area codes in the United States.

Where is area code 307 located?

It is located in Wyoming, USA, covering all counties and cities within the state.

What time zone is 307 in?

The 307 area code follows Mountain Time (MST/MDT).

Which counties are included in 307?

All counties in Wyoming, including Albany, Natrona, Laramie, Teton, and Campbell.

Feature	Details
Area Code	307
Region Covered	Entire state of Wyoming, USA
Established	1947 (original NANP code)
Time Zone	Mountain Time (MST/MDT)
Major Cities	Cheyenne, Casper, Laramie, Gillette, Rock Springs, Sheridan, Jackson
ZIP Range	82001-83001 (examples above)
Services	Landline, mobile, VoIP, business
Dialing	7-digit local dialing; international format +1 307 NXX XXXX
Country	United States of America

Ares Code	Office / Place	Address
307 Area Code	University of Wyoming	1000 E University Ave, Laramie, WY 82071
307 Area Code	Casper College	125 College Dr, Casper, WY 82601
307 Area Code	Laramie County Community College � Cheyenne Campus	1400 E College Dr, Cheyenne, WY 82007
307 Area Code	Jackson Hole Community School / Learning Centers	Jackson, WY 83001
307 Area Code	Gillette College	300 W Sinclair St, Gillette, WY 82716
307 Area Code	Cheyenne Regional Medical Center	214 E 23rd St, Cheyenne, WY 82001
307 Area Code	Banner Health � Wyoming Medical Center	1233 E 2nd St, Casper, WY 82601
307 Area Code	St. John�s Health	401 N Madison St, Jackson, WY 83001
307 Area Code	Memorial Hospital of Sweetwater County	1200 W Flaming Gorge Way, Rock Springs, WY 82901
307 Area Code	Memorial Hospital	1000 W 5th St, Sheridan, WY 82801
307 Area Code	Wells Fargo Bank	1610 Capitol Ave, Cheyenne, WY 82001
307 Area Code	First Interstate Bank	400 S Center St, Casper, WY 82601
307 Area Code	First National Bank of Wyoming	402 W 2nd St, Gillette, WY 82716
307 Area Code	Bank of Jackson Hole	225 S Glenwood St, Jackson, WY 83001
307 Area Code	Wyoming Bank & Trust	130 S 3rd St, Laramie, WY 82070
307 Area Code	Wyoming State Capitol	200 W 24th St, Cheyenne, WY 82001
307 Area Code	Laramie County Courthouse	200 W 14th St, Cheyenne, WY 82001
307 Area Code	Natrona County Courthouse	200 N Center St, Casper, WY 82601
307 Area Code	Sheridan County Courthouse	224 S Main St, Sheridan, WY 82801
307 Area Code	Teton County Courthouse	307 S Willow St, Jackson, WY 83001
307 Area Code	Cheyenne Frontier Days Old West Museum	4610 Carey Ave, Cheyenne, WY 82001
307 Area Code	National Historic Trails Interpretive Center	1501 N Poplar St, Casper, WY 82601
307 Area Code	National Museum of Wildlife Art	2820 Rungius Rd, Jackson, WY 83001
307 Area Code	King�s Saddlery & Museum	114 S Main St, Sheridan, WY 82801
307 Area Code	American Heritage Center	1100 E University Ave, Laramie, WY 82071
307 Area Code	Grand Teton National Park	Grand Teton National Park, WY 83001
307 Area Code	Yellowstone National Park � Wyoming Entrance	Yellowstone, WY 82190
307 Area Code	Cheyenne Botanic Gardens	710 S Lions Park Dr, Cheyenne, WY 82007
307 Area Code	Vedauwoo Recreation Area	Vedauwoo Rd, Laramie, WY 82070
307 Area Code	Bear Trap Canyon	Rock Springs, WY 82901
307 Area Code	Laramie County Library � Central	2200 Pioneer Ave, Cheyenne, WY 82001
307 Area Code	Natrona County Library � Central	307 E 2nd St, Casper, WY 82601
307 Area Code	Albany County Library � Laramie	125 S 2nd St, Laramie, WY 82070
307 Area Code	Teton County Library	125 Virginian Ln, Jackson, WY 83001
307 Area Code	Cheyenne Regional Airport	11000 Airport Pkwy, Cheyenne, WY 82007
307 Area Code	Casper�Natrona County International Airport	8500 Airport Pkwy, Casper, WY 82604
307 Area Code	Jackson Hole Airport	Jackson Hole Airport, Wilson, WY 83014
307 Area Code	Southwest Wyoming Regional Airport	2760 Airport Rd, Rock Springs, WY 82901
307 Area Code	Casper Events Center	125 College Dr, Casper, WY 82601
307 Area Code	Cheyenne Frontier Days Arena	4610 Carey Ave, Cheyenne, WY 82001
307 Area Code	War Memorial Stadium (University of Wyoming)	1000 E University Ave, Laramie, WY 82071
307 Area Code	Sheridan Recreation Center	50 Grinnell Plaza, Sheridan, WY 82801
307 Area Code	Jackson Town Square	Jackson, WY 83001
307 Area Code	Historic Governor�s Mansion	300 E 21st St, Cheyenne, WY 82001
307 Area Code	White Mountain Petroglyphs	Rock Springs, WY 82901
307 Area Code	Sinks Canyon State Park	Lander, WY 82520
307 Area Code	Hot Springs State Park	134 Park St, Thermopolis, WY 82443

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