Area Code 779
Area Code 779 is in Illinois
(847 and 224) - (815 and 779)
(630 and 331) - (312 and 872)
(773 and 872)
Area Code 779 History:
Area code 779 was officially put into service. Area code 779 is an overlay of area code 815.
Counties in Illinois within area code 779 include:
Boone County, Bureau County, Carroll County, DeKalb County, Ford County, Grundy County, Henry County, Iroquois County, Jo Daviess County, Kane County, Kankakee County, Kendall County, La Salle County, Lee County, Livingston County, Marshall County, McHenry County, McLean County, Ogle County, Putnam County, Stephenson County, Whiteside County, Will County, and Winnebago County.
Major cities or places in Illinois within area code 779 include:
Area codes 779 and 815 serve a large area of northern Illiois including the larger cities and communities of Crystal Lake, DeKalb, Freeport, Joliet, Kankakee, Loves Park, Machesney Park, McHenry, Rockford, Romeoville and Woodstock, in addition to many smaller communities within the service area.