National Phone Number Registry NPNR

Phone Number Area Code 312

Area code 312 is located in Illinois.

(312)
Enter 7-digit phone number for area code 312 or the complete 10-digit phone number

Phone Prefixes for Area Code 312

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Area code Location Company / Service Provider
312-201 CHICAGO, IL AMERITECH ILLINOIS
312-202 CHICAGO, IL AMERITECH ILLINOIS
312-203 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-204 CHICAGO, IL AMERITECH ILLINOIS
312-205 CHICAGO, IL ALLEGIANCE TELECOM, INC. - IL
312-206 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-207 CHICAGO, IL AMERITECH ILLINOIS
312-208 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-209 NORTHBROOK, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
312-212 CHICAGO, IL AMERITECH ILLINOIS
312-213 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-214 CHICAGO, IL AMERITECH ILLINOIS
312-215 WHEELING, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-216 CHICAGO, IL FIRST COMMUNICATIONS LLC - IL
312-217 CHICAGO, IL SPRINT SPECTRUM L.P.
312-218 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-219 CHICAGO, IL BANDWIDTH.COM CLEC, LLC - IL
312-220 CHICAGO, IL AMERITECH ILLINOIS
312-221 CHICAGO, IL SPRINT SPECTRUM L.P.
312-222 CHICAGO, IL AMERITECH ILLINOIS
312-223 CHICAGO, IL AMERITECH ILLINOIS
312-224 CHICAGO, IL BROADWING COMMUNICATIONS, LLC - IL
312-225 CHICAGO, IL AMERITECH ILLINOIS
312-226 CHICAGO, IL AMERITECH ILLINOIS
312-227 CHICAGO, IL AMERITECH ILLINOIS
312-228 CHICAGO, IL AMERITECH ILLINOIS
312-229 CHICAGO, IL AMERITECH ILLINOIS
312-230 CHICAGO, IL AMERITECH ILLINOIS
312-231 ROSELLE, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-232 CHICAGO, IL AMERICAN MESSAGING (AM), INC.
312-233 CHICAGO, IL AMERITECH ILLINOIS
312-234 CHICAGO, IL AMERITECH ILLINOIS
312-235 CHICAGO, IL AMERITECH ILLINOIS
312-236 CHICAGO, IL AMERITECH ILLINOIS
312-237 CHICAGO, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
312-238 CHICAGO, IL BROADWING COMMUNICATIONS, LLC - IL
312-239 CHICAGO, IL AT&T LOCAL
312-240 CHICAGO, IL AMERITECH ILLINOIS
312-241 CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-242 CHICAGO, IL TELEPORT COMMUNICATIONS AMERICA, LLC - IL
312-243 CHICAGO, IL AMERITECH ILLINOIS
312-244 CHICAGO, IL AMERITECH ILLINOIS
312-245 CHICAGO, IL AMERITECH ILLINOIS
312-246 WHEELING, IL NEW CINGULAR WIRELESS PCS, LLC - IL
312-247 CHICAGO, IL FIRST COMMUNICATIONS LLC - IL
312-248 CHICAGO, IL METRO PCS, INC.
312-249 CHICAGO, IL USA MOBILITY WIRELESS, INC.
312-250 CHICAGO, IL USA MOBILITY WIRELESS, INC.
312-251 CHICAGO, IL AMERITECH ILLINOIS
312-252 CHICAGO, IL ALLEGIANCE TELECOM, INC. - IL

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