phone book, or the business directory.

Area Code 312

Located in the Central (GMT -06:00) time zone. Area code 312 serves the state of Illinois. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 312 is a General Purpose Code. 312 service area does overlap with 872 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Information for Area Code 312

Area Code
312
Country
United States
State
Illinois (IL)
Major City
Chicago
Time Zone
Central (GMT -06:00)
Population
2,926,848
White Population
1,246,728
Black Population
1,056,172
Hispanic Population
756,641
Asian Population
132,567
Hawaiian Population
1,790
Indian Population
10,306
Other Population
394,394
Male Population
1,421,401
Female Population
1,505,447
Avg House Value
$161,712.50
Avg Household Income
$41,879.71
Avg Persons Per Household
2.60
Median Age
33.17
Median Age (Male)
32.02
Median Age (Female)
34.14

List of Cities in Area Code Overlay Complex 270

  • Chicago
  • Hinsdale
  • La Grange Park
  • Buffalo Grove
  • Northbrook
  • Glenview
  • Roselle

List of Zip Codes in Area Code 312

  • 60654
  • 60661
  • 60606
  • 60611
  • 60601
  • 60603
  • 60605
  • 60604
  • 60015
  • 60062
  • 60026
  • 60090
  • 60070
  • 60089
  • 60699
  • 60602
  • 60701
  • 60616
  • 60607
  • 60172
  • 60157
  • 60193
  • 60619
  • 60621
  • 60637
  • 60513
  • 60558
  • 60526
  • 60804
  • 60632
  • 60623
  • 60522
  • 60514
  • 60652
  • 60638
  • 60629
  • 60615
  • 60609
  • 60653
  • 60614
  • 60647
  • 60657
  • 60636
  • 60612
  • 60624

SPs and Telephone companies in Area Code 270

  • Ameritech Illinois
  • Sprint Spectrum L.p.
  • Teleport Communications America, Llc - Il
  • T-mobile Usa, Inc.
  • At&t Local
  • Bandwidth.com Clec, Llc - Il
  • New Cingular Wireless Pcs, Llc - Il
  • Usa Mobility Wireless, Inc.
  • American Messaging Services, Llc
  • Mcimetro Access Transmission Services Llc
  • Broadwing Communications, Llc - Il
  • Us Xchange Of Illinois Llc Dba Choice One Comm Il
  • Cellco Partnership Dba Verizon Wireless - Il
  • First Communications Llc - Il
  • Mci Worldcom Communications, Inc. - Il
  • 365 Wireless, Llc
  • Peerless Network Of Illinois, Llc - Il
  • Rcn Telecom Services Of Illinois, Inc. - Il
  • Broadvox-clec, Llc - Il
  • Getgo Communications Llc - Il
  • Level 3 Telecom Of Illinois, Llc - Il
  • Comcast Phone Of Illinois, Llc Dba Comco - Il
  • Indiana Paging Ntwk
  • Centurylink Communications Llc
  • Xo Illinois, Inc.
  • Level 3 Communications, Llc - Il
  • Global Crossing Local Services, Inc.-il
  • Ovation Communications Of Illinois, Inc.
  • Neutral Tandem-illinois, Llc - Il
  • Rclec, Inc. - Il
  • Airus, Inc. - Il
  • Paetec Communications, Inc. - Il
  • Teleport Communications America, Llc - IL
  • Cellco Partnership Dba Verizon Wireless - IL
  • Broadvox-Clec, Llc - IL
  • Metro Pcs, Inc.
  • At&t Corp.
  • Net Talk.com, Inc. - Il
  • Cbeyond Communications, Llc - Il
  • Allegiance Telecom, Inc. - Il
  • Sigecom, Llc Dba Wow Internet Cable And Phone
  • Access One, Inc. - Il
  • Bandwidth.com Clec, Llc - IL
  • First Communications, Llc
  • New Cingular Wireless Pcs, Llc - IL
  • Vonage Network Inc.
  • Ymax Communications Corp. - Il
  • Pg Telecom Of Illinois Inc. - Il

Phone Numbers Beginning With 312