307 Area Code
Covers Cheyenne and nearby communities in Wyoming.
(307) 555-0142Area code 307 map
Interactive coverage map for area code 307, centered on Cheyenne, Wyoming
41.1400, -104.8203
Open in OpenStreetMapArea code 307 coverage map — centered on Cheyenne. Shaded area shows the approximate reach around the primary city.
Calls tagged with area code 307 come from Cheyenne and nearby communities in Wyoming. It reaches roughly 122,000 people across places such as Cheyenne, Casper, Gillette, Laramie and more. The region observes Mountain time, so a number like (307) 555-0142 is on that clock right now. On the ground it spans Laramie, Natrona, Campbell and nearby counties. It is not currently paired with an overlay code. Local calls inside the 307 area can generally be placed with ten digits, and you do not need a leading 1 for domestic calls. Keep reading for the current local time in Cheyenne, a map of the 307 coverage area, the places it reaches, nearby and overlay codes, and how to tell a real 307 call from a scam.
Cities covered by 307
Cities & neighborhoods
- Cheyenne
- Casper
- Gillette
- Laramie
Nearby & overlay area codes
Overlay codes (same area)
These share 307’s geography — a number in either code can be on the same street.
307 has no overlay code right now.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 307 a scam?
Area code 307 serves Cheyenne and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 307 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 307 number from abroad
Every 307 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 307 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 307 555-0142 - Australia
0011 1 307 555-0142 - Japan
010 1 307 555-0142 - Mexico
00 1 307 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 307 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 307: frequently asked questions
Where is the 307 area code located?
The 307 area code is located in Wyoming, centered on Cheyenne. It covers Laramie, Natrona, Campbell, Albany and nearby communities including Cheyenne, Casper, Gillette, Laramie.
What time zone is 307 in?
Area code 307 is in the Mountain time zone (UTC-7 (MST) / UTC-6 (MDT)). You can see the exact current local time for Cheyenne on the live clock above.
What cities use area code 307?
Cities and areas that use 307 include Cheyenne, Casper, Gillette, Laramie. Its primary city is Cheyenne, WY.
Do I need to dial 1 before 307?
You generally do not need to dial a leading 1 for domestic calls to 307. Ten-digit dialing (the 307 code plus the seven-digit number) is the safest habit.
Is 307 a toll-free or scam number?
No — 307 is a normal geographic area code for Cheyenne, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 307 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 307?
Area code 307 does not currently have an overlay code; it is not layered on top of another code in the same area.