Area code 307 is the only area code serving the entire state of Wyoming. As one of the original 86 area codes established in 1947, it remains unique because Wyoming has never needed an additional code due to its low population density. From the rugged landscapes of Yellowstone National Park to the small towns and ranches that define the state, 307 is more than just a number—it’s a symbol of Wyoming’s identity.
The History of Area Code 307
- In 1947, the North American Numbering Plan (NANP) assigned 307 to all of Wyoming.
- Unlike most states, which eventually added new area codes, Wyoming has never needed a second one due to its small population (currently around 580,000 people).
- 307 is one of only 12 states in the U.S. with a single area code, alongside states like Montana (406) and North Dakota (701).
Why Does Wyoming Still Have Only One Area Code?
- Low Population Density – Wyoming has the smallest population of any U.S. state, meaning fewer phone numbers are needed.
- Slow Growth in Phone Usage – Even with mobile phones, demand for new numbers has never exceeded supply.
- Statewide Identity – Many Wyoming residents take pride in 307 as a representation of the entire state, creating a sense of unity.
Cities and Regions Covered by Area Code 307
Since 307 covers the entire state, it includes both major cities and remote towns.
Major Cities in the 307 Area
- Cheyenne – The state capital and largest city, known for the Cheyenne Frontier Days rodeo.
- Casper – A key economic and cultural hub in central Wyoming.
- Laramie – Home to the University of Wyoming.
- Gillette – A major center for coal, oil, and natural gas production.
- Rock Springs – A historic mining town with a strong economy.
- Sheridan – Known for its Western heritage and outdoor recreation.
- Jackson – A popular tourist destination near Yellowstone and Grand Teton National Parks.
National Parks and Landmarks in the 307 Area
- Yellowstone National Park – The first national park in the world, attracting millions of visitors.
- Grand Teton National Park – Famous for its stunning mountain scenery and wildlife.
- Devils Tower – A national monument and sacred site in Native American culture.
- The Wind River Range – A favorite for hiking, camping, and outdoor adventures.
The Cultural Significance of 307
- 307 is more than just an area code—it’s a part of Wyoming’s identity. Many residents see it as a badge of pride, symbolizing the state’s independent, frontier spirit.
- Wyoming businesses, sports teams, and even state marketing campaigns embrace 307 as a branding tool.
- March 7 (3/07) is celebrated as “307 Day” to honor Wyoming’s culture and heritage.
Potential Changes and Future of Area Code 307
- 307 is expected to remain Wyoming’s only area code for the foreseeable future.
- No overlay or new area code has been proposed since the state’s population and phone number demand remain stable.
- However, if phone number exhaustion ever occurs, Wyoming could see the introduction of a second area code or an overlay requiring 10-digit dialing.
Interesting Facts About Area Code 307
- Wyoming is the least populated state in the U.S., yet 307 still provides enough numbers for everyone.
- The University of Wyoming’s sports teams often use “307” in branding, emphasizing state pride.
- Yellowstone National Park has the most famous 307-based phone numbers, used by park offices and visitor centers.
- Wyoming is one of the last states in the U.S. to maintain seven-digit dialing, as no overlay has been introduced.
Conclusion
Area code 307 is more than just a telephone number—it’s a symbol of Wyoming’s unity, independence, and rich history. Covering the entire state, from Cheyenne to Yellowstone, it remains a unique identifier for residents, businesses, and visitors. With no immediate need for a second area code, 307 will likely remain Wyoming’s sole area code for years to come.