WYOMING · AREA CODE GUIDE
307 area code location: Cheyenne and Casper, Wyoming
- Local date and time
- Mountain Time
Map data: UCLA Geoportal (2015) · NANPA · US Census Bureau, checked 26 September 2026. Boundaries are approximate.
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Download the 307 area code map
307 area code at a glance
- State
- Wyoming
- Primary cities
- Cheyenne, Casper, and Gillette
- Established
- Time zone
- Mountain Time
- New code planned
- No, as of 22 September 2026
307 is one of the original 1947 area codes and is still Wyoming's only one.
An area code does not show where a caller is now.
Rules for answering calls in Wyoming
General information with its sources, not legal advice. All sources checked 2 November 2026. An area code does not show where a caller is.
Recording calls
Wyoming law lets a person intercept a communication as a party, or with one party's prior consent to the interception, unless the purpose is a criminal or tortious act, with exceptions set out in the law.
Source: Wyo. Stat. § 7-3-702(b)(iv)
Under Wyoming's interception law, a person whose communication is intercepted, disclosed, or used in violation of it may recover actual damages of at least $1,000 for each day of violation, punitive damages, and reasonable attorney's fees, with exceptions set out in the law.
Source: Wyo. Stat. § 7-3-710(a)(i)–(iii)
Sources: NANPA area code listing, NANPA places by area code. Checked .
Business phone numbers in area code 307, answered by an AI agent
A local number for Cheyenne, Casper, and Gillette, Wyoming, with an AI receptionist that takes caller details, answers the questions you give it, and books appointments. Numbers depend on what carriers have left.