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Area Code 773 Location & Details

State / Region: Illinois • Country: United States

Major Cities Covered: Chicago, West Chicago

Standard Dial Format
+1 (773) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 773?
IllinoisState Hub →
Country Territory
United States
773 Area Code Time Zone
Central
773 Overlay Codes
872

Area Code 773 Geographic Map

Interactive location bounds and coverage area for Illinois (Central Timezone)

Lat: 41.87° • Lng: -87.95°
📍 Geographic Center: IllinoisMap data © OpenStreetMap contributors

Where is Area Code 773 Located?

Telephone area code 773 is assigned to Illinois in United States. It serves cities and metropolitan communities including Chicago, West Chicago.

Historical Context & Area Code Overlay Information:773 serves Illinois (United States).

For local and long-distance calls within area code 773, standard 10-digit dialing (773) XXX-XXXX applies.

Who Called Me from Area Code 773?

Received an unknown call, missed call, or text scam from area code 773? Here is how to trace who is calling from 773 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 773 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 773:

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

Learn How Reverse Phone Lookups Work→

How to Call Area Code 773 & Dialing Format

When placing a phone call to a number in area code 773, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (773) + 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 + 773 + 7-digit number.
  • Do I need to dial area code 773 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 773

Urban centers, census places, and communities within the +1-773 calling area

2 Major Cities Listed
City NameCountyPopulation% of 773 Pop
ChicagoCook County2,731,58599.1%
West ChicagoDuPage County25,2960.9%

Counties Covered by Area Code 773

Geographic county distribution and population coverage across Illinois

County NameTotal Population% of 773 Area% of County
Cook County5,188,79199.1%53%
DuPage County932,6510.9%3%

☎️Area Code 773 Exchange Prefixes & Carriers

Showing 50 of 799 central office 3-digit prefixes and assigned telecom carriers

57% Landline40% Wireless3% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(773) 200-📞LandlineCHICGOZN02FIVE9, INC.05/18/2023
(773) 201-📞LandlineCHICGOZN01SPOK, INC.N/A
(773) 202-📞LandlineCHICGOZN03ILLINOIS BELL TEL CON/A
(773) 203-📱WirelessCHICGOZN01NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 204-📞LandlineCHICGOZN07TELEPORT COMMUNICATIONS AMERICA, LLC - IL04/30/2025
(773) 205-📞LandlineCHICGOZN03ILLINOIS BELL TEL CON/A
(773) 206-📱WirelessCHICGOZN01NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 207-💻VoIPCHICGOZN10ONVOY, LLC08/07/2019
(773) 208-📱WirelessCHICGOZN01NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 209-📱WirelessCHICGOZN03T-MOBILE USA, INC.N/A
(773) 210-📞LandlineCHICGOZN01ILLINOIS BELL TEL CON/A
(773) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(773) 212-📞LandlineCHICGOZN03SPOK, INC.N/A
(773) 213-📱WirelessCHICGOZN01NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 214-📞LandlineCHICGOZN01SPOK, INC.N/A
(773) 215-📞LandlineCHICGOZN01SPOK, INC.N/A
(773) 216-📱WirelessCHICGOZN01T-MOBILE USA, INC.N/A
(773) 217-📱WirelessCHICGOZN09NEW CINGULAR WIRELESS PCS, LLC - IL05/19/2009
(773) 218-📱WirelessCHICGOZN01NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 219-📱WirelessCHICGOZN07T-MOBILE USA, INC.N/A
(773) 220-📱WirelessCHICGOZN03T-MOBILE USA, INC.N/A
(773) 221-📞LandlineCHICGOZN09ILLINOIS BELL TEL CON/A
(773) 222-📞LandlineCHICGOZN01SPOK, INC.N/A
(773) 223-📞LandlineCHICGOZN06SPOK, INC.N/A
(773) 224-📞LandlineCHICGOZN07ILLINOIS BELL TEL CON/A
(773) 225-📱WirelessCHICGOZN03T-MOBILE USA, INC.03/15/2006
(773) 226-📱WirelessCHICGOZN10T-MOBILE USA, INC.11/27/2007
(773) 227-📞LandlineCHICGOZN04ILLINOIS BELL TEL CON/A
(773) 228-📞LandlineCHICGOZN01SPOK, INC.N/A
(773) 229-📞LandlineCHICGOZN08ILLINOIS BELL TEL CON/A
(773) 230-📱WirelessCHICGOZN03NEW CINGULAR WIRELESS PCS, LLC - ILN/A
(773) 231-📞LandlineCHICGOZN07LEVEL 3 COMMUNICATIONS, LLC - IL09/08/2011
(773) 232-💻VoIPCHICGOZN10ONVOY, LLC02/05/2020
(773) 233-📞LandlineCHICGOZN10ILLINOIS BELL TEL CON/A
(773) 234-💻VoIPCHICGOZN06BANDWIDTH.COM CLEC, LLC - IL06/26/2009
(773) 235-📞LandlineCHICGOZN04ILLINOIS BELL TEL CON/A
(773) 236-📱WirelessCHICGOZN07T-MOBILE USA, INC.06/26/2009
(773) 237-📞LandlineCHICGOZN05ILLINOIS BELL TEL CON/A
(773) 238-📞LandlineCHICGOZN10ILLINOIS BELL TEL CON/A
(773) 239-📞LandlineCHICGOZN10ILLINOIS BELL TEL CON/A
(773) 240-📱WirelessCHICGOZN10T-MOBILE USA, INC.10/16/2007
(773) 241-📞LandlineCHICGOZN07ILLINOIS BELL TEL CON/A
(773) 242-📞LandlineCHICGOZN06ILLINOIS BELL TEL CON/A
(773) 243-📞LandlineCHICGOZN03MCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(773) 244-📞LandlineCHICGOZN04ILLINOIS BELL TEL CON/A
(773) 245-💻VoIPCHICGOZN08BANDWIDTH.COM CLEC, LLC - IL06/16/2010
(773) 246-📞LandlineCHICGOZN04INDIANA PAGING NETWORK, INC.N/A
(773) 247-📞LandlineCHICGOZN06ILLINOIS BELL TEL CON/A
(773) 248-📞LandlineCHICGOZN04ILLINOIS BELL TEL CON/A
(773) 249-📞LandlineCHICGOZN11LEVEL 3 COMMUNICATIONS, LLC - ILN/A

Frequently Asked Questions about Area Code 773

Where is area code 773 located?

Area code 773 is located in Illinois (United States), serving cities like Chicago, West Chicago.

What timezone is area code 773?

Area code 773 operates in the Central timezone.

What state is area code 773?

Area code 773 is assigned to the state / telecom territory of Illinois.

Is area code 773 a scam or dangerous?

Area code 773 is an official geographic area code for Illinois. However, beware of robocaller spoofing.

Illinois State Area Codes

View complete directory of telephone area codes assigned to Illinois.

Explore Illinois Directory

Get a 773 Business Phone Number

How to acquire a virtual phone number or business line with area code 773 for local customer trust in Illinois.

Get 773 Business Number
🛡️ Scam & Safety Directory

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Overlay & Nearby Area Codes for Illinois

Explore neighboring telecom prefixes sharing geographical boundaries with area code 773.

872
Central
Area Code 872
Chicago
217
Central
Area Code 217
Springfield, Champaign, Decatur, Urbana, Quincy, Danville, Jacksonville, Charleston, Mattoon, Chatham
224
Central
Area Code 224
Elgin, Waukegan, Schaumburg, Evanston, Arlington Heights, Skokie, Palatine, Des Plaines, Mount Prospect, Hoffman Estates
309
Central
Area Code 309
Peoria, Bloomington, Normal, Moline, Romeoville, Rock Island, Pekin, Galesburg, East Peoria, Crest Hill
312
Central
Area Code 312
Chicago, West Chicago
331
Central
Area Code 331
Aurora, Naperville, Schaumburg, Bolingbrook, Wheaton, Downers Grove, Elmhurst, Lombard, Bartlett, Oswego