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Area Code 779
Active Prefixes in Area Code 779
779-239
Princeton
779-666
Rockford
779-456
Joliet
779-238
Rockford
779-226
Polo
779-229
Spring Valley
779-379
Joliet
779-213
Oglesby
779-246
Ogle
779-251
Dixon
779-257
Wilmington, Illinois
779-209
Sandwich
779-250
Sterling, Illinois
779-244
Mchenry
779-348
Rockford
779-537
Rockford
779-227
Joliet
779-218
Watseka
779-242
Joliet
779-215
Tonica
779-939
Joliet
779-959
Ua, Illinois
779-232
Wilmington
779-261
Fairbury, Illinois
779-204
Verona
779-256
Rockford, Illinois
779-235
Crescent City
779-777
Dekalb
779-223
Onarga
779-423
Rockford
779-771
Rockford
779-801
Kankakee
779-234
Plainfield
779-205
Joliet
779-245
Sterling
779-903
Braidwood
779-301
Kankakee
779-222
Dekalb
779-545
Mount Morris
779-600
Cissnapark, Illinois
779-994
Crystal Lake
779-243
Frankfort
779-432
Sheffield
779-201
La Salle
779-529
Manteno
779-260
Joliet, Illinois
779-233
Joliet
779-259
Manteno, Illinois
779-804
Pontiac
779-970
Rockford
779-774
Rockford
779-262
Oglesby, Illinois
779-263
Will
779-247
Mchenry
779-300
Rockford
779-214
Galena
779-999
Newark
779-800
Crystal Lake
779-202
Galena
779-701
Kankakee
779-206
Joliet
779-368
Rockford
779-212
Dekalb
779-241
Morris
779-875
Joliet
779-225
Joliet
779-240
Kankakee
779-706
Sandwich
779-978
Sandwich
779-236
Kankakee
779-324
Frankfort
779-237
Ancona
779-252
Plainfield
779-207
Rockford
779-216
Frankfort
779-444
Wonder Lake
779-915
Woodstock
779-901
Marengo
779-228
Mazon
779-702
Joliet
779-248
Galena
779-200
Rockford
779-435
Joliet
779-601
La Salle
779-208
Rockford
779-203
Rockford
779-210
Rockford
779-475
South Beloit
779-770
Rockford
779-249
Dwight, Illinois
779-302
Woodstock
779-717
Spring Valley
779-513
Rockford
779-888
Rockford
779-254
Frankfort
779-803
New Lenox
779-429
Wilmington
779-221
Rockford
779-382
Genoa
779-552
Belvidere
779-303
Plainfield
779-772
Rockford
779-548
Marengo
779-258
Herscher, Illinois
779-253
South Beloit
779-220
Crystal Lake
779-704
Mchenry
779-287
Union
779-333
Frankfort
779-231
Joliet
779-958
Ua, Illinois
779-713
Woodstock
779-400
Dekalb
779-861
Dixon
779-279
Joliet
779-500
Rockford
779-696
Rockford
779-931
Sandwich
779-230
Joliet
779-703
Joliet
779-255
De Kalb, Illinois
779-707
Joliet