Phone

Area Code 312 - Illinois

Area Code 312 Details and Prefixes.
Area Code 312 Details
Major City Chicago
State/Province Illinois
Country United States
Time Zone Central (UTC-06:00)

Area Code 312 Prefixes

Prefix Company County Phone Type
312-201 Ameritech Illinois Cook Landline
312-202 Ameritech Illinois Cook Landline
312-203 New Cingular Wireless PCS Cook Cell Number
312-204 Ameritech Illinois Cook Landline
312-205 Allegiance Telecom Cook Landline
312-206 New Cingular Wireless PCS Cook Cell Number
312-207 Ameritech Illinois Cook Landline
312-208 New Cingular Wireless PCS Cook Cell Number
312-209 Cellco Partnership DBA Verizon Wireless Cook Cell Number
312-212 Ameritech Illinois Cook Landline
312-213 New Cingular Wireless PCS Cook Cell Number
312-214 Ameritech Illinois Cook Landline
312-215 New Cingular Wireless PCS Cook Cell Number
312-216 First Communications LLC Cook Landline
312-217 United States Cellular Corp. - Illinois Cook Cell Number
312-218 New Cingular Wireless PCS Cook Cell Number
312-219 Bandwidth.com Clec Cook Cell Number
312-220 Ameritech Illinois Cook Landline
312-221 Sprint Spectrum L.p. Cook Cell Number
312-222 Ameritech Illinois Cook Landline
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