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Area Code 312

Where does the 312 area code belong?

STATE
Illinois
TIME ZONE
Central Time
MAJOR CITY
Chicago

The 312 Area Code (or Area Code 312) is located in the state of MO. Area Code 312 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 1.63 million unique phone numbers and 5.08 million individuals near the city of Saint Louis

Area Code 312 History

Area code 312 was put into service. In 1989 Area code 312 was split to form area code 708. In 1996 area code 312 was split again to form area code 773. In 2009 area code 312 was overlaid with area code 872.

Following cities also use area code 312:

Chicago, Hinsdale, La Grange Park, Northbrook, Roselle, Wheeling.

ZIP codes in Area Code 312:

60001 (Alden)
60002 (Antioch)
60004 (Arlington Heights)
60005 (Arlington Heights)
60006 (Arlington Heights)
60007 (Elk Grove Village)
60008 (Rolling Meadows)
60009 (Elk Grove Village)
60010 (Barrington)
60011 (Barrington)

Big city in area code 312

Chicago

COUNTY
Cook
POPULATION
2,699,382
Source: WorldAtlas.com
NUMBER OF PREFIXES
783
NUMBER OF CELLPHONES
366,899
NUMBER OF LAND LINES
1,046,017
MEDIAN HOME VALUE
$157K
MEDIAN INCOME
$89.3K
Source: WorldAtlas.com

Browse Area Code (312) Prefixes

PREFIX COUNTY CITY CARRIER TYPE
312-924 Cook Chicago Paetec Communications, Inc. - IL Landline
312-925 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-926 Cook Chicago Ameritech Illinois Landline
312-927 Cook Chicago T-Mobile Usa, Inc. Wireless
312-928 Cook Chicago Ameritech Illinois Landline
312-929 Cook Chicago T-Mobile Usa, Inc. Landline
312-930 Cook Chicago Ameritech Illinois Landline
312-931 Cook Chicago Ameritech Illinois Landline
312-932 Cook Chicago Ameritech Illinois Landline
312-933 Cook Chicago Sprint Spectrum L.p. Wireless
312-935 Cook Chicago Ameritech Illinois Landline
312-936 Cook Chicago Ameritech Illinois Wireless
312-938 Cook Chicago Ameritech Illinois Landline
312-939 Cook Chicago Ameritech Illinois Landline
312-941 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-942 Cook Chicago Ameritech Illinois Landline
312-943 Cook Chicago Ameritech Illinois Landline
312-944 Cook Chicago Ameritech Illinois Landline
312-945 Cook Chicago Ameritech Illinois Landline
312-946 Cook Chicago Ameritech Illinois Landline
312-947 Cook Chicago Ameritech Illinois Landline
312-948 Cook Chicago Ovation Communications Of Illinois, Inc. Landline
312-949 Cook Chicago Ameritech Illinois Landline
312-951 Cook Chicago Ameritech Illinois Landline
312-952 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-953 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-954 Cook Chicago Ameritech Illinois Landline
312-955 Cook Chicago Rcn Telecom Services Of Illinois, Inc. - IL Landline
312-957 Cook Chicago Ameritech Illinois Landline
312-960 Cook Chicago Ameritech Illinois Landline
312-961 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-962 Cook Chicago Global Crossing Local Services, Inc.-Il Landline
312-963 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-965 Cook Chicago Cellco Partnership Dba Verizon Wireless - IL Wireless
312-968 Cook La Grange Park Cellco Partnership Dba Verizon Wireless - IL Wireless
312-969 Cook La Grange Park Cellco Partnership Dba Verizon Wireless - IL Wireless
312-970 Cook Chicago Ameritech Illinois Landline
312-972 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-974 Cook Chicago Ameritech Illinois Landline
312-977 Cook Chicago Ameritech Illinois Landline
312-979 Cook Chicago Ameritech Illinois Wireless
312-980 Cook Chicago Teleport Communications America, Llc - IL Landline
312-981 Cook Chicago Ovation Communications Of Illinois, Inc. Landline
312-983 Cook Chicago Ameritech Illinois Landline
312-984 Cook Chicago Ameritech Illinois Landline
312-985 Cook Chicago Ovation Communications Of Illinois, Inc. Landline
312-986 Cook Chicago Ameritech Illinois Landline
312-987 Cook Chicago Ameritech Illinois Landline
312-988 Cook Chicago Ameritech Illinois Landline
312-990 DuPage Hinsdale New Cingular Wireless Pcs, Llc - IL Wireless
312-991 Cook Wheeling New Cingular Wireless Pcs, Llc - IL Wireless
312-992 Cook Chicago Ameritech Illinois Landline
312-993 Cook Chicago Ameritech Illinois Landline
312-994 Cook Chicago Ovation Communications Of Illinois, Inc. Landline
312-996 Cook Chicago Ameritech Illinois Landline
312-997 Cook Chicago Ameritech Illinois Landline
312-999 Cook Chicago Xo Illinois, Inc. Landline
« 1 ...8 9 10 »

Phone Numbers Starting With (312) Area Code

Phone Number
312-982-4088		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3129824088		 Update Time
Mar-31-2025
Phone Number
312-714-6765		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3127146765		 Update Time
Mar-31-2025
Phone Number
312-500-4541		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3125004541		 Update Time
Mar-31-2025
Phone Number
312-487-3799		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3124873799		 Update Time
Mar-31-2025
Phone Number
312-953-2995		 USAGE
Wireless		 City
Chicago		 Operate
Read more about who called from 3129532995		 Update Time
Mar-31-2025
Phone Number
312-505-6175		 USAGE
Wireless		 City
Chicago		 Operate
Read more about who called from 3125056175		 Update Time
Mar-31-2025
Phone Number
312-680-8815		 USAGE
Wireless		 City
Chicago		 Operate
Read more about who called from 3126808815		 Update Time
Mar-31-2025
Phone Number
312-494-0273		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3124940273		 Update Time
Mar-31-2025
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