Area code 779 — Illinois
Area code 779 is in Illinois and serves Belvidere, La Salle, Peru, DeKalb. Time zone, overlays, counties and ZIP codes.
| Location | Illinois (much of northern Illinois outside Chicago and its immediate surrounding suburbs: Rockford and its suburbs, Belvidere, La Salle, Peru, DeKalb, Sycamore, Freeport, Dixon, Sterling, Rock Falls, Ottawa, Morris, Princeton, Mendota, Rochelle, Sandwich, Streator, Pontiac, Kankakee, and some outlying Chicago suburbs such as Harvard, McHenry, Crystal Lake, Woodstock, Plainfield, Joliet, Romeoville, Lockport, New Lenox, Frankfort, Minooka, Channahon, and Shorewood) |
|---|---|
| Main places | Belvidere, La Salle, Peru, DeKalb, Sycamore, Freeport, Dixon, Sterling, Rock Falls, Ottawa, Morris, Princeton |
| State | Illinois |
| Status | In service · since 2007 |
| Time zone | Central · |
| Overlay codes | 815 Overlays share the same area. Local calls usually need 10-digit dialing. |
| Local dialing | 1+10D |
History
- Overlaid on 815
Counties (approximate)
Boone CountyBureau CountyCarroll CountyCookCook CountyDeKalb CountyDuPageDuPage CountyFord CountyGrundy CountyHenry CountyIroquois CountyJo Daviess CountyKaneKane CountyKankakeeKankakee CountyKendall CountyLaSalle CountyLee CountyLivingston CountyMarshall CountyMcHenryMcHenry CountyMcLean CountyOgle CountyPutnam CountyStark CountyStephenson CountyWhiteside County
ZIP codes in area code 779
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
60001 Alden60012 Crystal Lake60014 Crystal Lake60033 Harvard60034 Hebron60039 Crystal Lake60050 Mchenry60051 Mchenry60072 Ringwood60097 Wonder Lake60098 Woodstock60111 Clare60112 Cortland60113 Creston60115 Dekalb60119 Elburn60129 Esmond60135 Genoa60144 Kaneville60145 Kingston60146 Kirkland60150 Malta60151 Maple Park60156 Lake In The Hills60178 Sycamore60401 Beecher60403 Crest Hill60404 Shorewood60407 Braceville60408 Braidwood60410 Channahon60411 Chicago Heights60412 Chicago Heights60416 Coal City60417 Crete60418 Crestwood60420 Dwight60421 Elwood60422 Flossmoor60423 Frankfort
Format a 779 number
US numbers are written as (779) 555-0123 or 779-555-0123. From outside the US, dial +1 779 555 0123.
Is a call from 779 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.