Area code 307 — the telephone code for Wyoming
Area code 307 is the single North American Numbering Plan area code serving the entire U.S. state of Wyoming. Created in 1947, it remains the state's sole area code and covers all major cities and rural areas.
Area code 307 is the three-digit numbering plan area (NPA) that serves the entire U.S. state of Wyoming. Assigned in 1947 as part of the original North American Numbering Plan, 307 has continued to provide telephone numbering for every county, town and community in the state without a split or overlay.
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Characteristics and coverage
The 307 NPA follows the standard North American telephone format: NPA-NXX-XXXX (three-digit area code, three-digit central office code, four-digit station number). Because Wyoming is sparsely populated compared with many states, a single area code is sufficient to meet numbering demand across both urban centers and remote areas.
Major communities served
- Cheyenne (state capital)
- Casper
- Laramie
- Gillette
- Rock Springs and Green River
- Sheridan and Jackson
These cities and numerous smaller towns all use the same 307 code, which simplifies local identity and numbering administration statewide.
History and significance
307 was established with the first nationwide plan to organize telephone numbering and routing in North America. Unlike many more populous states that later required additional area codes, Wyoming has retained 307 alone, reflecting its relatively low population and modest growth in numbering needs.
Uses and notable facts
Beyond routing calls, area code 307 functions as a cultural shorthand for Wyoming identity — businesses, sports teams and residents sometimes use "307" in branding. Administratively, the code supports landlines, mobile phones, business lines and public-safety communications across the state. As with all NPAs, the allocation of central office codes and individual numbers is managed according to policies under the North American Numbering Plan.
Questions and answers
Q: What is area code 307?
A: Area code 307 is the only area code for the U.S. State of Wyoming.
Q: When was area code 307 created?
A: Area code 307 was created in 1947.
Q: Is there any other area code for Wyoming?
A: No, there is only one area code for Wyoming, which is area code 307.
Q: How many area codes were there in 1947?
A: The text does not specify how many area codes there were in 1947.
Q: How many states share area code 307?
A: Only one state, which is Wyoming, shares area code 307.
Q: What was the purpose of creating area codes in the U.S.?
A: The text does not specify the purpose of creating area codes in the U.S.
Q: Has area code 307 ever been changed?
A: The text does not provide information on whether or not area code 307 has ever been changed.
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Author
AlegsaOnline.com Area code 307 — the telephone code for Wyoming Leandro Alegsa
URL: https://en.alegsaonline.com/art/5395