Area Code 312-800 : Area Code 312-899 is your one-stop site for area code lookup, phone number lookup, and free phone number reviews. Following is reverse lookup detail & reviews for area code 312 8xx including 312 area code location map. Major cities such as Chicago, Burr Ridge, Bensenville, Bridgeview, Elk Grove Village covered within area code 312 8xx are also listed on this page. More area codes, including those outside of Illinois, United States of America, are on the homepage.

Reverse Lookup Detail for Area Code 312 8xx

Area code 312 covers part of Illinoisstate, covering most of Cook, Dupage counties. It was started on Jan 01, 2000. This region follows US/Central + Daylight Savings timezone. Other popular area codes that belong to Illinois state include 217, 224, 309, 331, 618, 630, 708, 773, 779, 815, 847, 872.

Verified changes in Area Code 312 8XX

Date ChangedChange Details
Apr 29, 2014Area code 312-843 was introduced on Mar 17, 2014 and subscribers are operational from Apr 29, 2014.
Apr 18, 2014Area code 312-888 was introduced on Feb 10, 2012 and subscribers are operational from Apr 18, 2014.
Apr 18, 2014Area code 312-846 was introduced on May 21, 2001 and subscribers are operational from Apr 18, 2014.
Feb 06, 2014Area code 312-809 was introduced on Jan 07, 2014 and subscribers are operational from Feb 06, 2014.

Area Code 312-800 - Area Code 312-899 (Covers 312 8xx xxxx phone numbers)

Area CodeCityCountyPopulationNetwork Operator
312-800-3Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-800-2ChicagoCook519,467Level 3 Communications LLC - IL
312-800-5ChicagoCook519,467Ovation Communications of Illinois Inc
312-800-0ChicagoCook519,467Peerless Network of Illinois LLC - IL
312-800-7ChicagoCook519,467Teleport Communications America LLC - IL
312-801-7BensenvilleCook519,467MCImetro Access Transmission Services LLC
312-801-0ChicagoCook519,467365 WIRELESS LLC
312-801-6ChicagoCook519, CLEC LLC - IL
312-801-9ChicagoCook519,467Cbeyond Communications LLC - IL
312-801-8ChicagoCook519,467First Communications LLC - IL
312-801-0ChicagoCook519,467T-Mobile USA Inc
312-802ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-803Elk Grove VillageCook519,467MCI Worldcom Communications Inc - IL
312-804ChicagoCook519,467T-Mobile USA Inc
312-805ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-806Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-807ChicagoCook519,467Ameritech Illinois
312-808ChicagoCook519,467Ameritech Illinois
312-809-0BensenvilleCook519,467MCImetro Access Transmission Services LLC
312-809-9ChicagoCook519, CLEC LLC - IL
312-810Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-811615,813One Call Services-Pipeline And Utility Safety
312-812ChicagoCook519,467Ameritech Illinois
312-813Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-814ChicagoCook519,467Ameritech Illinois
312-816-0Burr RidgeDupage916,924New Cingular Wireless PCS LLC - IL
312-817ChicagoCook519,467Ameritech Illinois
312-818-3ChicagoCook519,467Broadvox-CLEC LLC - IL
312-818-5ChicagoCook519,467Level 3 Communications LLC - IL
312-818-0ChicagoCook519,467T-Mobile USA Inc
312-818-7ChicagoCook519,467Teleport Communications America LLC - IL
312-819ChicagoCook519,467Ameritech Illinois
312-820Burr RidgeCook519,467USA Mobility Wireless Inc
312-821BensenvilleCook519,467MCImetro Access Transmission Services LLC
312-821Elk Grove VillageCook519,467MCI Worldcom Communications Inc - IL
312-822ChicagoCook519,467Ameritech Illinois
312-823-0ChicagoCook519,467Ameritech Illinois
312-823-9ChicagoCook519,467T-Mobile USA Inc
312-827ChicagoCook519,467Ameritech Illinois
312-828ChicagoCook519,467Ameritech Illinois
312-829ChicagoCook519,467Ameritech Illinois
312-830Burr RidgeCook519,467USA Mobility Wireless Inc
312-831ChicagoCook519,467Ameritech Illinois
312-832ChicagoCook519,467Ameritech Illinois
312-833ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-834-6BridgeviewCook519,467Sprint Spectrum LP
312-834-0ChicagoCook519,467Ameritech Illinois
312-834-7ChicagoCook519, CLEC LLC - IL
312-834-9SchaumburgCook519,467Denali Spectrum License LLC
312-835ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-836ChicagoCook519,467Ameritech Illinois
312-839ChicagoCook519,467American Messaging (AM) Inc
312-840ChicagoCook519,467Ameritech Illinois
312-841-4BridgeviewCook519,467Sprint Spectrum LP
312-841-0Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-841-7ChicagoCook519, CLEC LLC - IL
312-841-5SchaumburgCook519,467Denali Spectrum License LLC
312-842ChicagoCook519,467Ameritech Illinois
312-843-9ChicagoCook519,467T-Mobile USA Inc
312-843-0ChicagoCook519,467Teleport Communications America LLC - IL
312-844-0Burr RidgeDupage916,924New Cingular Wireless PCS LLC - IL
312-845ChicagoCook519,467Ameritech Illinois
312-846-0ChicagoCook519,467Ameritech Illinois
312-846-6ChicagoCook519,467Comcast Phone of Illinois LLC - IL
312-846-9ChicagoCook519,467Teleport Communications America LLC - IL
312-846-0SchaumburgCook519,467Denali Spectrum License LLC
312-848ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-849ChicagoCook519,467Ameritech Illinois
312-850ChicagoCook519,467Ameritech Illinois
312-851Burr RidgeCook519,467USA Mobility Wireless Inc
312-852-9BridgeviewCook519,467Sprint Spectrum LP
312-852-0Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-853ChicagoCook519,467Ameritech Illinois
312-854-9ChicagoCook519, CLEC LLC - IL
312-854-8ChicagoCook519,467Cbeyond Communications LLC - IL
312-854-2ChicagoCook519,467Level 3 Communications LLC - IL
312-854-0ChicagoCook519,467RCN Telecom Services of Illinios Inc - IL
312-855ChicagoCook519,467Ameritech Illinois
312-856ChicagoCook519,467Ameritech Illinois
312-857-0ChicagoCook519,467Ameritech Illinois
312-857-8ChicagoCook519, CLEC LLC - IL
312-859ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-860Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-861ChicagoCook519,467Ameritech Illinois
312-862-0ChicagoCook519,467Ameritech Illinois
312-863-0ChicagoCook519,467Ovation Communications of Illinois Inc
312-863-9ChicagoCook519,467T-Mobile USA Inc
312-863-0SchaumburgCook519,467Denali Spectrum License LLC
312-863-8Wood DaleCook519,467XO Illinois Inc
312-864ChicagoCook519,467Ameritech Illinois
312-865-0SchaumburgCook519,467New Cingular Wireless PCS LLC - IL
312-867ChicagoCook519,467Ameritech Illinois
312-869-0ChicagoCook519,467Ameritech Illinois
312-869-9ChicagoCook519, CLEC LLC - IL
312-869-1SchaumburgCook519,467Denali Spectrum License LLC
312-870-8ChicagoCook519,467Ameritech Illinois
312-870-0ChicagoCook519, CLEC LLC - IL
312-870-0ChicagoCook519,467First Communications LLC - IL
312-873BensenvilleCook519,467MCImetro Access Transmission Services LLC
312-873Elk Grove VillageCook519,467MCI Worldcom Communications Inc - IL
312-875ChicagoCook519,467Ameritech Illinois
312-876ChicagoCook519,467Ameritech Illinois
312-878-8ChicagoCook519,467Level 3 Communications LLC - IL
312-879-0ChicagoCook519,467Ameritech Illinois
312-880-8BridgeviewCook519,467Sprint Spectrum LP
312-880-1ChicagoCook519,467First Communications LLC - IL
312-881-8Arlington HeightsCook519,467Broadwing Communications LLC - IL
312-881-3ChicagoCook519,467Ameritech Illinois
312-882ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-884-7Arlington HeightsCook519,467Broadwing Communications LLC - IL
312-884-0ChicagoCook519,467Ovation Communications of Illinois Inc
312-886ChicagoCook519,467Ameritech Illinois
312-887-9BridgeviewCook519,467Sprint Spectrum LP
312-888-0Burr RidgeCook519,467New Cingular Wireless PCS LLC - IL
312-888-9ChicagoCook519,467Comcast Phone of Illinois LLC - IL
312-890-0BridgeviewCook519,467Sprint Spectrum LP
312-891Burr RidgeCook519,467USA Mobility Wireless Inc
312-892ChicagoCook519,467Broadwing Communications LLC - IL
312-893ChicagoCook519,467Broadwing Communications LLC - IL
312-894-0BensenvilleCook519,467MCImetro Access Transmission Services LLC
312-895ChicagoCook519,467Broadwing Communications LLC - IL
312-896ChicagoCook519,467Broadwing Communications LLC - IL
312-898ElginCook519,467Cellco Partnership dba Verizon Wireless - IL
312-899-0ChicagoCook519,467Ameritech Illinois

Recent Free Phone Number Reviews in Area Code 312 8xx

No reviews yet.

Verified phone numbers in Area Code 312

Area Code#Area Code#Area Code#Area Code#Area Code#
312 9241272312 5681053312 279962312 759918312 216851
312 683746312 470714312 402611312 981598312 788535
312 212503312 291479312 972471312 428461312 504457
312 957448312 806437312 252415312 399411312 283402
312 765400312 373397312 622384312 498379312 208375

Map for area code 312 8xx  

Loading Map

Current Time in 312-8 Area Code

  • :
  • :

312 Area Code

At, you'll find current information on 312area code, including 312 area code location & map. Other phone area code may be searched using's area code locator service on the homepage. Use the phone number search function above to instant verify area code lookup & phone number lookup.

Illinois Area Codes Directory provides a free area codes directory with detailed information on the various USA area codes, area codes listing, and other area codes phone details. also lists international area codes within the North American Numbering Plan. And you can verify owners of phone numbers using the reverse number lookup service by entering a 10 digit phone number in the top most text box.

312 Area Code Finder

Find area codes by using's area code finder. provides an area codes location map service for area codes of USA. When using these maps, please note that area zip codes are different than phone number area codes used for calling.

Illinois Area Code Lookup is an excellent resource for area code lookup and reverse number lookup. Here you'll find area codes, city, county, population & operator list table of area codes within the United States. Also, you can verify owners of phone numbers with full name & address information for background check. For a full list of area codes, visit home page. It provides drilldown for USA area codes and area code location maps.

Reverse Phone Number Verification

Find owner information using the reverse phone number search function on With phone number search function, you can find owner information & detailed area codes information in the United States.

Telephone/Landline Area Codes is a resource of North American telephone area codes. Beyond area code listings, relevant information about each area code is detailed. For example, this page details area code 312-8. You can also search area codes by state, and within the NANP, find country area codes.

Free Area Codes Locator for Illinois

The area codes locator shows the coverage area for each phone number area code. Area code locations are also listed by city next to the area code maps on this page. Also, read reviews within an area code.

312 Area Code Reviews provides local reviews for phone numbers and aggregates results per area code. It shows you the area code location covered by each area code; for example, the LA area code reveiws covers local business phone numbers area in Los Angeles. This page details area code 312-8. All USA states area codes may be found using

Telephone Area Codes in Illinois

The telephone area code prefixes local phone numbers & is not required to be dialed. For area codes by city, search Area codes telephone differ from region to region, and in some places the area code must be dialed even when calling locally within that region. Find out more with area code decoder.

External links & resources for area code 312 in Illinois

  • CitySites Pages for Illinois (Source: Official CitySites)
  • Wikipedia Article on Area Code 312 (Source: Wikipedia)
  • State Information Resources for Illinois (Source: State Information)