Area code 307 covers Cheyenne and surrounding areas in Wyoming. It is one of the original 86 area codes established by AT&T in 1947.
| State | Wyoming |
|---|---|
| Primary city | Cheyenne |
| Cities also served | Cheyenne, Casper, Gillette, Laramie, Rock Springs, Sheridan, Jackson, Cody |
| Time zone | Mountain (UTC-7 / UTC-6 DST) |
| Year established | January 1, 1947 |
| Original 1947 NPA? | Yes |
| Overlay codes | None |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Local seven-digit dialing may still apply |
Cities Served by Area Code 307
Area code 307 serves Entire state of Wyoming, including the following cities and communities:
- Cheyenne
- Casper
- Gillette
- Laramie
- Rock Springs
- Sheridan
- Jackson
- Cody
How to Get a 307 Phone Number
There are three ways to get a phone number with the 307 area code, each suited to a different need:
- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 307 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 307 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 307 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 307 number. If you already have a 307 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Wyoming sometimes can’t accept inbound ports of 307 numbers due to 911 routing rules.
Looking for a 307 number? 212areacode.com offers premium 307 numbers for Cheyenne, Wyoming — choose your number, port it to any carrier in 3–5 business days, and pay a one-time fee with no monthly charges. Browse available 307 numbers →
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Browse 307 Numbers →Frequently Asked Questions
Is the 307 area code still in use?
Yes. 307 is actively assigned to new phone lines in Entire state of Wyoming.
Can I get a 307 number if I don't live in Wyoming?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 307 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 307 a scam area code?
No. 307 is a legitimate, active area code for Entire state of Wyoming. Like any area code, scammers occasionally spoof 307 caller IDs, but the code itself is heavily used by real Wyoming businesses, government offices, and residents.
Does area code 307 cover all of Wyoming?
Yes. Area code 307 is the sole area code for the entire state of Wyoming, covering all 23 counties and every city and town in the state.
Has area code 307 ever been split or had an overlay added?
No. Since its introduction on January 1, 1947, area code 307 has never been split or given an overlay code. Wyoming’s relatively small and stable population has kept number demand well within a single code’s capacity.
Do I need to dial 10 digits for local calls in Wyoming?
Because 307 has no overlay, seven-digit local dialing is still permitted in many areas of Wyoming. However, dialing the full 10-digit number (307 + 7 digits) always works and is the recommended practice.
What time zone is the 307 area code in?
Area code 307 is entirely in the Mountain Time Zone — UTC-7 during standard time and UTC-6 during Daylight Saving Time (observed from the second Sunday in March to the first Sunday in November).
