sosou.de
sosou.de

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
312-424 Cook Chicago Ameritech Illinois Landline
312-425 Cook Chicago Ameritech Illinois Landline
312-426 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-427 Cook Chicago Ameritech Illinois Landline
312-428 Cook Chicago Level 3 Communications, Llc - IL Wireless
312-429 Cook Chicago Global Crossing Local Services, Inc.-Il Landline
312-430 Cook Chicago Ameritech Illinois Landline
312-431 Cook Chicago Ameritech Illinois Landline
312-432 Cook Chicago Ameritech Illinois Landline
312-433 Cook Chicago Ameritech Illinois Landline
312-434 Cook Chicago Sprint Spectrum L.p. Wireless
312-435 Cook Chicago Ameritech Illinois Landline
312-436 Cook Chicago Ameritech Illinois Landline
312-437 Cook Chicago Sprint Spectrum L.p. Wireless
312-440 Cook Chicago Ameritech Illinois Landline
312-441 Cook Chicago Ameritech Illinois Landline
312-442 Cook Chicago Ameritech Illinois Landline
312-443 Cook Chicago Ameritech Illinois Landline
312-444 Cook Chicago Ameritech Illinois Landline
312-445 Cook Chicago Ameritech Illinois Landline
312-446 Cook Chicago Sprint Spectrum L.p. Wireless
312-447 Cook Chicago Ameritech Illinois Landline
312-448 Cook Chicago Cellco Partnership Dba Verizon Wireless - IL Wireless
312-449 Cook Chicago American Messaging Services, Llc Wireless
312-450 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-451 Cook Chicago T-Mobile Usa, Inc. Landline
312-452 Cook Chicago American Messaging Services, Llc Wireless
312-453 Cook Chicago Mci Worldcom Communications, Inc. - IL Landline
312-454 Cook Chicago Ameritech Illinois Landline
312-455 Cook Chicago Ameritech Illinois Landline
312-456 Cook Chicago Ameritech Illinois Landline
312-457 Cook Chicago American Messaging Services, Llc Wireless
312-458 Cook Chicago Ameritech Illinois Landline
312-459 Cook Chicago T-Mobile Usa, Inc. Wireless
312-460 Cook Chicago Ameritech Illinois Landline
312-461 Cook Chicago Ameritech Illinois Landline
312-462 Cook Chicago Ameritech Illinois Landline
312-463 Cook Chicago Ameritech Illinois Landline
312-464 Cook Chicago Ameritech Illinois Landline
312-465 Cook Chicago Us Xchange Of Illinois Llc Dba Choice One Comm IL Landline
312-466 Cook Chicago Ameritech Illinois Landline
312-467 Cook Chicago Ameritech Illinois Landline
312-469 Cook Chicago Ameritech Illinois Landline
312-470 Cook Chicago Mcimetro Access Transmission Services Llc Landline
312-472 Cook Chicago Ameritech Illinois Landline
312-473 Cook Chicago Ymax Communications Corp. - IL Landline
312-474 Cook Chicago Ameritech Illinois Landline
312-475 Cook Chicago Ameritech Illinois Landline
312-476 Cook Chicago Sprint Spectrum L.p. Landline
312-477 Cook Chicago Level 3 Communications, Llc - IL Wireless
312-478 Cook Chicago T-Mobile Usa, Inc. Landline
312-479 Cook Chicago At&t Local Landline
312-480 Cook Chicago New Cingular Wireless Pcs, Llc - IL Wireless
312-482 Cook Chicago Ameritech Illinois Landline
312-484 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-485 Cook Chicago Cellco Partnership Dba Verizon Wireless - IL Wireless
312-486 Cook Chicago Mci Worldcom Communications, Inc. - IL Landline
312-488 Cook Chicago Pg Telecom Of Illinois Inc. - IL Landline
312-489 Cook Chicago Cellco Partnership Dba Verizon Wireless - IL Wireless
312-490 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-491 Cook Chicago Ameritech Illinois Landline
312-492 Cook Chicago Ameritech Illinois Landline
312-493 Cook Chicago T-Mobile Usa, Inc. Wireless
312-494 Cook Chicago Ameritech Illinois Landline
312-495 Cook Chicago Usa Mobility Wireless, Inc. Wireless
312-496 Cook Chicago Ameritech Illinois Landline
312-497 Cook Chicago Cellco Partnership Dba Verizon Wireless - IL Wireless
312-498 Cook Chicago Sprint Spectrum L.p. Wireless
312-499 Cook Chicago Ameritech Illinois Landline
312-501 Cook La Grange Park Cellco Partnership Dba Verizon Wireless - IL Wireless
« 1 2 3 4 5 ...10 »

Phone Numbers Starting With (312) Area Code

Phone Number
312-818-5250		 USAGE
Wireless		 City
La Grange Park		 Operate
Read more about who called from 3128185250		 Update Time
Mar-26-2026
Phone Number
312-380-4033		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3123804033		 Update Time
Mar-26-2026
Phone Number
312-893-4813		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3128934813		 Update Time
Mar-26-2026
Phone Number
312-459-4089		 USAGE
Wireless		 City
Chicago		 Operate
Read more about who called from 3124594089		 Update Time
Mar-26-2026
Phone Number
312-399-2709		 USAGE
Wireless		 City
Chicago		 Operate
Read more about who called from 3123992709		 Update Time
Mar-26-2026
Phone Number
312-421-6700		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3124216700		 Update Time
Mar-26-2026
Phone Number
312-971-6408		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3129716408		 Update Time
Mar-26-2026
Phone Number
312-248-7479		 USAGE
Landline		 City
Chicago		 Operate
Read more about who called from 3122487479		 Update Time
Mar-26-2026
  1. United States
    2. >
  2. 3XX
    3. >
  3. Illinois - IL
    4. >
  4. Area code 312