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Wyoming · Mountain Time Updated July 2026

Area Codes in Wyoming

10 codes, from a 1947 original to 2022’s newest, and an 11th on the way

Wyoming has 1 active area code. 307 is Casper and its surroundings. Tap any code below for its full guide: who called, cities and ZIP codes, the coverage map and the live local time.

Not sure which code is yours? Every Wyoming city is covered below. Find your city ›
Area codes1
Original307 · 1947
Largest metroCasper
Local time9:10 AM MT
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→Cities & ZIP codes

Every city in the 404, with ZIPs and internet type.

→Coverage map

Exactly where area code 404 reaches.

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→Home internet

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All 1 Wyoming Area Code

Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.

307Buffalo, Casper, Cheyenne497 prefixes in serviceArea code 307 guide ›
Got a call from a Wyoming number you don’t recognize? Open that code’s guide above for its full prefix lookup. AT&T ActiveArmor® blocks spam automatically, included with AT&T wireless plans.Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See how ActiveArmor works

Wyoming Area Codes by City

The largest Wyoming communities and the area code that serve them. Every city links to its local AT&T internet page.

CityArea code(s)
Casper307
Cheyenne307
Cody307
Douglas307
Gillette307
Jackson307
Laramie307
Sheridan307

How Wyoming Got Its Codes

Every Wyoming area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.

In serviceCodeHow it arrived
1947307One of the original area codes of 1947

Source: NANPA NPA database, July 2026. Regenerated monthly.

Wyoming Area Code Map

Every active Wyoming area code at a glance, anchored to the metro each one serves. Tap any code above for its detailed coverage map.

Map of Wyoming area codes with anchor cities↓  Printable PDF

Open the printable Wyoming area code map (PDF) — poster format with a QR code back to this page.

AT&T IN GEORGIA

Internet, wireless & stores across the state

All AT&T services in Wyoming Home internet in Wyoming Wireless plans AT&T stores in Wyoming

AT&T Home Internet in Wyoming

AT&T home internet is available across Wyoming, checked address by address; every area code guide above lists its cities and what’s offered there.

No data capsNo annual contractNo equipment fees

AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.

Check availability at your addressAll AT&T services in Wyoming ›

Start with home internet in Wyoming, or pair it with wireless in an internet + wireless bundle.

Family streaming together on AT&T home internet
Home internet across WyomingCheck your address ›

AT&T Wireless in Wyoming

AT&T’s 5G network covers most of Wyoming. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between Wyoming codes, and great cell phone deals in Wyoming are a tap away.

5G across WyomingActiveArmor® includedKeep your number

AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.

Shop wireless plansBring your number ›

See the AT&T wireless coverage map for Wyoming ›

Woman smiling at her phone on a downtown street
Stay connected across WyomingShop wireless plans ›

AT&T Stores Across Wyoming

From the Casper metro to Evanston, Cheyenne and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.

Find your nearest AT&T store

Find stores in: Casper · Evanston · Cheyenne · Douglas · Cody

AT&T store employee helping a customer with her phone
Real help from real people across WyomingFind a store ›

Area Codes in Neighboring States

Montana area codesSouth Dakota area codesNebraska area codesColorado area codesUtah area codesIdaho area codesAll 50 states ›

Wyoming Area Code FAQ

How many area codes does Wyoming have?
Wyoming has 1 active area code: 307. Each links to a full guide above.
Which Wyoming area code is mine?
Tap any code above to see the communities it serves; each guide lists cities with ZIP codes and a coverage map.
Who called me from a Wyoming number?
Open that code's guide and check the prefix lookup: every assigned prefix with its carrier. No voicemail? Let it go — legitimate callers leave messages.
What time zone is Wyoming in?
Wyoming is primarily on Mountain time. The live local time is shown at the top of this page.
Does AT&T offer service in Wyoming?
Yes — home internet, wireless and retail stores across Wyoming. Availability is checked address by address.
Sources: prefix and carrier assignments from the NANPA central-office code registry; population figures from the U.S. Census Bureau; spam-pattern indicators from FTC Do Not Call filings and AT&T ActiveArmor® network telemetry. Facts are rebuilt from these sources at build time; the page regenerates monthly.
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