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Area Code 307 Location & Details

State / Region: Wyoming • Country: United States

Major Cities Covered: Cheyenne, Casper, Gillette, Laramie, Rock Springs, Sheridan, Evanston, Green River, Riverton, Jackson

Standard Dial Format
+1 (307) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 307?
WyomingState Hub →
Country Territory
United States
307 Area Code Time Zone
Mountain
307 Overlay Codes
No Overlays

Area Code 307 Geographic Map

Interactive location bounds and coverage area for Wyoming (Mountain Timezone)

Lat: 43.16° • Lng: -107.37°
📍 Geographic Center: WyomingMap data © OpenStreetMap contributors

Where is Area Code 307 Located?

Telephone area code 307 is assigned to Wyoming in United States. It serves cities and metropolitan communities including Cheyenne, Casper, Gillette, Laramie, Rock Springs, Sheridan, Evanston, Green River, Riverton, Jackson.

Historical Context & Area Code Overlay Information:307 serves Wyoming (United States).

For local and long-distance calls within area code 307, standard 10-digit dialing (307) XXX-XXXX applies.

Who Called Me from Area Code 307?

Received an unknown call, missed call, or text scam from area code 307? Here is how to trace who is calling from 307 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 307 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 307:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 307 & Dialing Format

When placing a phone call to a number in area code 307, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (307) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 307 + 7-digit number.
  • Do I need to dial area code 307 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 307

Urban centers, census places, and communities within the +1-307 calling area

50 Major Cities Listed
City NameCountyPopulation% of 307 Pop
CheyenneLaramie County66,50717.0%
CasperNatrona County58,77115.1%
GilletteCampbell County34,0248.7%
LaramieAlbany County32,2848.3%
Rock SpringsSweetwater County22,9365.9%
SheridanSheridan County20,0155.1%
EvanstonUinta County11,7053.0%
Green RiverSweetwater County11,4502.9%
RivertonFremont County10,9102.8%
JacksonTeton County10,7202.7%
CodyPark County10,3772.7%
RawlinsCarbon County7,7452.0%
LanderFremont County7,3791.9%
PowellBig Horn County6,5741.7%
DouglasConverse County6,4691.7%
TorringtonGoshen County6,2051.6%
BuffaloJohnson County4,7331.2%
WorlandWashakie County4,7301.2%
MillsNatrona County4,6341.2%
WheatlandPlatte County3,5160.9%

Counties Covered by Area Code 307

Geographic county distribution and population coverage across Wyoming

County NameTotal Population% of 307 Area% of County
Natrona County80,27117.8%86%
Laramie County101,68717.3%66%
Campbell County48,0929.1%74%
Sweetwater County41,3508.8%83%
Albany County38,5458.3%84%
Sheridan County32,9335.6%67%
Fremont County39,6644.7%46%
Uinta County20,6533.6%67%
Big Horn County12,0143.4%100%
Teton County23,3452.7%46%
Park County31,1072.7%33%
Carbon County14,0842.6%72%
Converse County13,7902.3%64%
Lincoln County20,9882.1%38%
Goshen County12,6391.6%49%
Johnson County8,8291.2%54%
Washakie County7,6371.2%62%
Platte County8,5631.2%54%
Weston County6,8701.1%62%
Sublette County8,9491.0%43%
Hot Springs County4,6060.7%59%
Crook County7,7910.7%35%
Niobrara County2,3150.4%61%

☎️Area Code 307 Exchange Prefixes & Carriers

Showing 50 of 523 central office 3-digit prefixes and assigned telecom carriers

64% Landline24% Wireless12% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(307) 200-📞LandlineJACKSONLEVEL 3 COMMUNICATIONS, LLC - WY08/16/2002
(307) 201-📞LandlineJACKSONLEVEL 3 COMMUNICATIONS, LLC - WY01/07/2003
(307) 202-📱WirelessPOWELLNEW CINGULAR WIRELESS PCS, LLC01/21/2003
(307) 203-📱WirelessJACKSONT-MOBILE USA, INC.03/14/2001
(307) 204-📞LandlineCODYAIRUS, INC. - WY02/06/2018
(307) 205-📞LandlineLINGLELEVEL 3 COMMUNICATIONS, LLC - WY11/16/2016
(307) 206-📞LandlineLANDERMCIMETRO ACCESS TRANSMISSION SERVICES LLC12/05/2013
(307) 207-📞LandlineLAKEAIRUS, INC. - WY12/06/2018
(307) 208-📞LandlineWYLocal Exchange CarrierN/A
(307) 209-📱WirelessROCK SPGCELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY12/19/2014
(307) 210-📱WirelessSOUTHESRDNNEW CINGULAR WIRELESS PCS, LLC04/03/2020
(307) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(307) 212-📞LandlineROCK SPGLEVEL 3 COMMUNICATIONS, LLC - WY07/16/2002
(307) 213-📞LandlineCODYLEVEL 3 COMMUNICATIONS, LLC - WY07/16/2002
(307) 214-📱WirelessCHEYENNECELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY01/06/2003
(307) 215-💻VoIPCASPERBANDWIDTH.COM CLEC, LLC - WY07/26/2001
(307) 216-📱WirelessLUSKNEW CINGULAR WIRELESS PCS, LLC10/09/2002
(307) 217-📱WirelessBUFFALONEW CINGULAR WIRELESS PCS, LLC10/09/2002
(307) 218-💻VoIPSHERIDANONVOY, LLC - WY08/13/2019
(307) 219-📞LandlinePOWELLCENTURYLINK COMMUNICATIONS, LLC03/26/2015
(307) 220-📱WirelessCHEYENNET-MOBILE USA, INC.N/A
(307) 221-📱WirelessCHEYENNET-MOBILE USA, INC.N/A
(307) 222-📞LandlineCHEYENNELEVEL 3 COMMUNICATIONS, LLC - WYN/A
(307) 223-📞LandlineLARAMIELEVEL 3 COMMUNICATIONS, LLC - WYN/A
(307) 224-📞LandlineCASPERLEVEL 3 COMMUNICATIONS, LLC - WYN/A
(307) 225-📞LandlineLARAMIECHARTER IP ENABLED SERVICES, LLC09/02/2020
(307) 226-📞LandlineAFTONMCIMETRO ACCESS TRANSMISSION SERVICES LLC12/28/2015
(307) 227-💻VoIPMAMMOTHONVOY, LLC - WYN/A
(307) 228-💻VoIPGILLETTEBANDWIDTH.COM CLEC, LLC - WY05/23/2014
(307) 229-📱WirelessCOKEVILLENEW CINGULAR WIRELESS PCS, LLC02/17/2015
(307) 230-💻VoIPBORDERBANDWIDTH.COM CLEC, LLC - WY07/19/2022
(307) 231-📱WirelessPINEDALECELLCO PARTNERSHIP DBA VERIZON WIRELESS - WYN/A
(307) 232-📞LandlineCASPERQWEST CORPORATIONN/A
(307) 233-📞LandlineCASPERQWEST CORPORATIONN/A
(307) 234-📞LandlineCASPERQWEST CORPORATIONN/A
(307) 235-📞LandlineCASPERQWEST CORPORATIONN/A
(307) 236-📱WirelessBURNSNEW CINGULAR WIRELESS PCS, LLC04/03/2020
(307) 237-📞LandlineCASPERQWEST CORPORATIONN/A
(307) 238-📱WirelessHAMITNDOMENEW CINGULAR WIRELESS PCS, LLC08/22/2017
(307) 239-📱WirelessDUBOISNEW CINGULAR WIRELESS PCS, LLC11/05/2015
(307) 240-📱WirelessRIVERTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - WYN/A
(307) 241-📱WirelessWHEATLANDNEW CINGULAR WIRELESS PCS, LLCN/A
(307) 242-📞LandlineLAKEQWEST CORPORATIONN/A
(307) 243-💻VoIPCASPERONVOY, LLC - WYN/A
(307) 244-📞LandlineFREEDOMSILVER STAR TEL CO INC05/15/2019
(307) 245-📞LandlinePINEBLUFFSRT COMMUNICATIONSN/A
(307) 246-📞LandlineALBINRT COMMUNICATIONSN/A
(307) 247-📱WirelessCASPERNEW CINGULAR WIRELESS PCS, LLCN/A
(307) 248-📱WirelessAFTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY03/25/2003
(307) 249-📞LandlineJACKSONTELNYX LLC03/24/2017

Frequently Asked Questions about Area Code 307

Where is area code 307 located?

Area code 307 is located in Wyoming (United States), serving cities like Cheyenne, Casper, Gillette, Laramie, Rock Springs, Sheridan, Evanston, Green River, Riverton, Jackson.

What timezone is area code 307?

Area code 307 operates in the Mountain timezone.

What state is area code 307?

Area code 307 is assigned to the state / telecom territory of Wyoming.

Is area code 307 a scam or dangerous?

Area code 307 is an official geographic area code for Wyoming. However, beware of robocaller spoofing.

Wyoming State Area Codes

View complete directory of telephone area codes assigned to Wyoming.

Explore Wyoming Directory

Get a 307 Business Phone Number

How to acquire a virtual phone number or business line with area code 307 for local customer trust in Wyoming.

Get 307 Business Number
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