779 Area Code: Location, Cities, Map And Time Zone

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Area Code 779

Area code 779 is in Illinois, USA , spanning 24 counties and serving 248 cities , including Joliet, Dekalb or Crystal Lake; it currently uses 337 prefixes , assigned from 779-200-XXXX through 779-999-XXXX.

In service since March 17, 2007, area code 779 is an overlay Numbering Plan Area, part of overlay complex 815/779.

The current local time is .

779 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 779 area code map

Phone number lookup

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More Illinois area codes:

  • 217
  • 224
  • 309
  • 312
  • 331
  • 447
  • 464
  • 618
  • 630
  • 708
  • 730
  • 773
  • 815
  • 847
  • 861
  • 872

Locate any 779-NXX prefix:

779-200-XXXX --- 779-299-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-200 Rockford Multiple 1/18/2011
779-201 La Salle Multiple 3/15/2012
779-202 Galena Multiple 3/6/2012
779-203 Rockford Multiple 10/13/2011
779-204 Verona Multiple 3/19/2014
779-205 Joliet Multiple 5/30/2012
779-206 Joliet Multiple 6/20/2012
779-207 Rockford Multiple N/A
779-208 Rockford Multiple 11/16/2012
779-209 Sandwich Peerless Network Of Illinois 8/31/2012
779-210 Rockford Multiple 9/16/2011
779-212 De Kalb Multiple 3/13/2013
779-213 Oglesby Multiple 4/9/2013
779-214 Galena Multiple 12/17/2009
779-215 Tonica Multiple 4/9/2013
779-216 Frankfort Multiple 4/9/2013
779-217 De Kalb Multiple 05/19/2023
779-218 Watseka Multiple 4/9/2013
779-219 Braidwood Commio 08/11/2023
779-220 Crystal Lake Multiple 5/25/2011
779-221 Rockford Multiple 4/2/2010
779-222 Sycamore Multiple 8/5/2010
779-223 Onarga Multiple 3/23/2016
779-224 Momence New Cingular Wireless PCS 06/08/2023
779-225 Joliet Multiple 9/21/2011
779-226 Polo Comcast IP Phone 4/24/2013
779-227 Joliet Multiple 7/1/2014
779-228 Mazon Multiple 4/10/2013
779-229 Depue Multiple 5/7/2013
779-230 Joliet Multiple 9/28/2016
779-231 Joliet MCIMetro Access Transmission Services 12/21/2015
779-232 Wilmington Multiple 6/7/2007
779-233 Joliet Multiple 7/21/2011
779-234 Plainfield Multiple 8/1/2013
779-235 Crescent City Multiple 2/4/2011
779-236 Kankakee Multiple 7/27/2011
779-237 Streator Multiple 1/8/2018
779-238 Rockford Multiple 4/4/2017
779-239 Princeton Multiple 1/14/2016
779-240 Kankakee Multiple 6/11/2014
779-241 Morris Multiple 6/1/2017
779-242 Joliet Multiple 10/5/2017
779-243 Frankfort Multiple 10/5/2017
779-244 Mchenry Multiple 10/5/2017
779-245 Sterling Multiple 7/14/2008
779-246 Rochelle Multiple 10/23/2017
779-247 Woodstock Multiple 12/1/2017
779-248 Galena Multiple 6/3/2016
779-249 Dwight Multiple 2/22/2018
779-250 Sterling Multiple 2/27/2018
779-251 Dixon Multiple 4/1/2014
779-252 Plainfield Multiple 1/6/2016
779-253 South Beloit Multiple 10/7/2014
779-254 Frankfort Multiple 9/1/2015
779-255 De Kalb Multiple 5/16/2018
779-256 Rockford Multiple 6/5/2018
779-257 Wilmington Multiple 7/11/2018
779-258 Herscher Multiple 8/27/2018
779-259 Manteno Multiple 8/27/2018
779-260 Joliet Multiple 10/8/2018
779-261 Fairbury Multiple 11/30/2018
779-262 Oglesby Multiple 12/5/2018
779-263 Plainfield Teleport Communications America 1/2/2018
779-264 Kankakee Multiple 10/7/2019
779-265 Mchenry Multiple 10/8/2019
779-266 Lanark Multiple 12/9/2019
779-267 Joliet Multiple 1/17/2020
779-268 St Anne Multiple 2/6/2020
779-269 Rockford Multiple 2/10/2020
779-270 De Kalb Multiple 2/19/2020
779-271 Lanark Multiple 4/29/2020
779-272 Rockford Multiple 5/1/2020
779-273 Danforth Multiple 5/28/2020
779-274 Rockford Multiple 6/26/2020
779-275 Rockford Multiple 7/28/2020
779-276 De Kalb Multiple 7/28/2020
779-277 Flanagan Multiple 8/12/2020
779-278 Grand Ridge Multiple 3/18/2021
779-279 Joliet Multiple 10/29/2008
779-280 Donovan Multiple 8/25/2020
779-281 Toluca Multiple 8/12/2020
779-282 Martinton Multiple 8/25/2020
779-283 Richmond Multiple 8/25/2020
779-284 Sheldon Multiple 8/25/2020
779-285 Sheridan Multiple 8/25/2020
779-286 Spring Grove Multiple 8/25/2020
779-287 Union Multiple 3/24/2016
779-288 Beaverville Multiple 6/2/2021
779-289 South Beloit Multiple 9/1/2020
779-290 Milford Multiple 9/2/2020
779-291 Wonder Lake Multiple 9/4/2020
779-292 Onarga Multiple 9/4/2020
779-293 New Lenox Multiple 9/4/2020
779-294 Harding Multiple 9/4/2020
779-295 Mazon Multiple 9/4/2020
779-296 Long Point Multiple 9/8/2020
779-297 Sterling Multiple 9/15/2020
779-298 Forrest Multiple 9/15/2020
779-299 Wenona Multiple 9/17/2020
779-300-XXXX --- 779-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-300 Rockford T-Mobile USA 2/17/2011
779-301 Kankakee Multiple 6/11/2014
779-302 Woodstock Multiple 2/27/2015
779-303 Plainfield Multiple N/A
779-304 Rutland Multiple 9/17/2020
779-305 Reddick Multiple 9/17/2020
779-306 Pontiac Multiple 9/17/2020
779-307 Lostant Multiple 9/17/2020
779-308 Chatsworth Multiple 9/17/2020
779-309 South Sharon Dish Wireless 06/13/2023
779-310 New Milford Multiple 9/17/2020
779-312 Woodstock Multiple 06/21/2023
779-313 Cherry Valley Multiple 9/17/2020
779-314 Rock Cut Multiple 9/17/2020
779-315 Roscoe Multiple 9/17/2020
779-316 Creston Multiple 9/17/2020
779-317 Kirkland Multiple 9/17/2020
779-318 Malta Multiple 9/17/2020
779-319 Maple Park Multiple 9/17/2020
779-320 Monroe Center Multiple 9/17/2020
779-321 Shabbona Multiple 9/17/2020
779-322 Thomas Multiple 9/17/2020
779-323 Rockford Multiple 9/30/2020
779-324 Frankfort Multiple 8/17/2010
779-325 Franklin Grove Multiple 11/25/2020
779-326 Dwight Multiple 12/10/2020
779-327 Warren Multiple 6/10/2021
779-328 Hanover Multiple 6/10/2021
779-329 Mendota Multiple 6/10/2021
779-330 Belvidere Multiple 6/22/2021
779-331 Kankakee Multiple 07/18/2023
779-332 Durand Multiple 6/10/2021
779-333 Frankfort Multiple 4/11/2013
779-334 De Kalb Multiple 11/4/2020
779-335 Rockford Multiple 6/23/2021
779-336 Woodstock Multiple 2/10/2021
779-337 Woodland Multiple 6/24/2021
779-338 Crescent City Multiple 6/24/2021
779-339 Frankfort Multiple 10/19/2021
779-340 Coal City Multiple 11/22/2021
779-341 Joliet Multiple 12/29/2021
779-342 Dwight Multiple 7/14/2021
779-343 German Valley Multiple 11/4/2021
779-344 Seward Multiple 11/4/2021
779-345 Byron Multiple 7/27/2020
779-346 Capron Multiple 9/18/2020
779-347 Winslow Multiple 11/4/2021
779-348 Rockford Multiple 6/13/2007
779-349 Spring Valley Multiple 1/11/2022
779-350 Momence New Cingular Wireless PCS 10/3/2022
779-351 Rockford Multiple 2/25/2022
779-352 Waterman Multiple 1/28/2022
779-353 Forreston Multiple 3/31/2022
779-354 Davis Level 3 Communications 3/31/2022
779-355 Harmon Level 3 Communications 3/31/2022
779-356 Crystal Lake Multiple 7/14/2020
779-357 Leaf River New Cingular Wireless PCS 4/12/2022
779-358 Plainfield Multiple 10/18/2022
779-359 Belvidere Multiple 11/15/2022
779-360 Momence New Cingular Wireless PCS 12/29/2022
779-361 Kankakee Multiple 01/03/2023
779-362 Fairbury Onvoy 01/19/2023
779-363 Rockford Multiple 02/08/2023
779-364 Streator Multiple 02/08/2023
779-365 De Kalb Multiple 02/15/2023
779-366 Rockford Multiple 03/08/2023
779-367 Sycamore Multiple 03/10/2023
779-368 New Milford Multiple 8/21/2007
779-369 Momence New Cingular Wireless PCS 03/16/2023
779-370 Rockford Multiple 04/18/2023
779-371 Momence New Cingular Wireless PCS 07/18/2023
779-372 Dixon Multiple 07/20/2023
779-373 Rockford Multiple 07/20/2023
779-374 Joliet Multiple 07/26/2023
779-375 Joliet Multiple 07/26/2023
779-376 Grant Park Multiple 08/11/2023
779-377 South Beloit Multiple 9/13/2021
779-378 Mchenry Multiple 08/18/2023
779-379 Joliet Multiple 10/29/2008
779-380 Momence New Cingular Wireless PCS 09/06/2023
779-381 La Salle Multiple 10/19/2023
779-382 Genoa Multiple 5/7/2007
779-383 Momence New Cingular Wireless PCS 10/30/2023
779-384 Harvard Multiple 01/09/2024
779-385 Momence Multiple 02/06/2024
779-386 Princeton Multiple 02/08/2024
779-387 Poplar Grove Onvoy 03/21/2024
779-388 Crystal Lake Multiple 03/22/2024
779-389 Garden Prairie Multiple 4/19/2021
779-390 Lockport Multiple 03/27/2024
779-391 New Lenox Onvoy Spectrum 03/29/2024
779-392 Oglesby Onvoy Spectrum 03/29/2024
779-393 Watseka Onvoy Spectrum 03/29/2024
779-394 Wellington Onvoy Spectrum 03/29/2024
779-395 Minooka Onvoy 04/02/2024
779-396 Woodstock Multiple 04/05/2024
779-397 Cabery Multiple 05/03/2023
779-398 Pontiac Onvoy 05/14/2024
779-399 Kinsman Multiple 1/8/2021
779-400-XXXX --- 779-499-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-400 De Kalb Multiple 2/17/2011
779-401 Kankakee Multiple 04/11/2024
779-402 Momence New Cingular Wireless PCS 04/30/2024
779-403 Mchenry Multiple 06/25/2024
779-404 Rochelle Multiple 07/08/2024
779-405 Rockford Multiple 09/19/2024
779-406 Momence New Cingular Wireless PCS 10/21/2024
779-407 Momence New Cingular Wireless PCS 01/14/2025
779-408 Joliet Multiple 01/21/2025
779-409 Elizabeth Multiple 02/28/2025
779-410 Stockton Multiple 3/30/2021
779-412 Momence New Cingular Wireless PCS 03/07/2025
779-413 Freeport United States Cellular 03/21/2025
779-414 Freeport United States Cellular 03/21/2025
779-415 Freeport United States Cellular 03/21/2025
779-416 Freeport United States Cellular 03/21/2025
779-417 Freeport United States Cellular 03/21/2025
779-418 Freeport United States Cellular 03/21/2025
779-419 Freeport United States Cellular 03/21/2025
779-420 Freeport United States Cellular 03/21/2025
779-421 Freeport United States Cellular 03/21/2025
779-422 De Kalb Cellco Partnership 04/22/2025
779-423 Rockford Multiple 8/8/2007
779-424 Rockford Multiple 06/10/2025
779-425 Forrest AT&T Enterprises 07/08/2025
779-426 Manhattan Multiple 1/13/2022
779-427 Momence New Cingular Wireless PCS 07/10/2025
779-428 Rockford Wavenation 07/21/2025
779-429 Wilmington Multiple 11/13/2008
779-430 Sterling Wavenation 07/21/2025
779-431 De Kalb Multiple 08/19/2025
779-432 Sheffield Mtco Communications 3/27/2007
779-433 Dixon Bandwidth.com Clec 09/08/2025
779-434 Joliet Multiple 11/14/2025
779-435 Joliet Multiple 11/13/2006
779-436 Plainfield T-Mobile USA N/A
779-437 Momence New Cingular Wireless PCS N/A
779-438 Momence New Cingular Wireless PCS N/A
779-444 Wonder Lake Multiple 8/17/2010
779-445 Lockport Multiple 11/8/2022
779-456 Joliet Multiple 1/9/2008
779-463 Morris Multiple 3/23/2022
779-465 Braidwood Multiple 10/10/2019
779-466 Emington Multiple 1/26/2022
779-475 South Beloit Multiple 3/27/2007
779-479 Graymont Multiple 4/18/2021
779-499 Freeport Multiple 9/13/2021
779-500-XXXX --- 779-599-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-500 Rockford Multiple 3/16/2011
779-513 Rockford Multiple 10/16/2015
779-529 Manteno Multiple 8/17/2010
779-537 Rockford Multiple 3/27/2007
779-545 Mount Morris Multiple 8/8/2007
779-548 Marengo Multiple 8/16/2010
779-552 Belvidere Multiple 6/4/2007
779-577 Rockford Multiple 9/13/2021
779-579 Kempton Multiple 4/18/2021
779-599 Paw Paw Multiple 7/14/2020
779-600-XXXX --- 779-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-600 Cissna Park Multiple 8/8/2019
779-601 La Salle Multiple 9/10/2014
779-624 Momence Multiple 1/13/2022
779-625 Woodstock Multiple 2/23/2022
779-639 Mchenry Multiple 1/13/2022
779-666 Rockford Onvoy 10/3/2017
779-675 Ohio Multiple 1/13/2022
779-677 Freeport Multiple 7/27/2020
779-678 Rockford Multiple 1/12/2021
779-679 Magnolia Multiple 4/18/2021
779-696 Rockford Paetec Itel 8/18/2010
779-699 South Beloit Multiple 7/17/2020
779-701-XXXX --- 779-799-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-701 Kankakee Multiple 1/28/2015
779-702 Joliet Multiple 6/11/2014
779-703 Joliet Multiple 10/7/2013
779-704 Mchenry Multiple 10/31/2013
779-706 Sandwich Multiple 2/24/2015
779-707 Joliet Multiple 4/21/2015
779-710 Rockford Multiple 3/18/2021
779-713 Woodstock Multiple 5/22/2015
779-717 Spring Valley Multiple 10/15/2015
779-722 Ashton Multiple 9/18/2020
779-729 Lena Multiple 4/13/2021
779-732 La Salle Multiple 2/10/2021
779-739 Forrest Twilio International 2/14/2022
779-746 Cissna Park Multiple 1/13/2022
779-749 Steward Multiple 4/13/2021
779-758 Joliet Multiple 10/11/2019
779-759 Sycamore Multiple 4/13/2021
779-766 Depue Multiple 7/14/2020
779-770 Rockford Multiple 11/18/2008
779-771 Rockford Multiple 11/18/2008
779-772 Rockford Multiple 11/18/2008
779-774 Rockford Multiple 2/1/2012
779-775 De Kalb Multiple 9/13/2021
779-777 De Kalb Multiple 10/22/2008
779-778 Winnebago Multiple 5/28/2020
779-779 Chadwick Onvoy 08/21/2025
779-783 Stockland Multiple 1/13/2022
779-788 Pecatonica Multiple 1/28/2021
779-789 Rockton Multiple 4/19/2021
779-790 Sterling Multiple 04/12/2023
779-797 Rockford Multiple 9/23/2021
779-799 Coleta Multiple 7/27/2020
779-800-XXXX --- 779-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-800 Crystal Lake Multiple 4/11/2013
779-801 Kankakee Multiple 9/7/2016
779-803 New Lenox Multiple 8/16/2013
779-804 Pontiac Multiple 2/24/2015
779-809 Fulton Multiple 3/28/2022
779-832 Cedar Point Multiple 1/13/2022
779-837 Elwood Multiple 1/7/2022
779-855 Forrest Terra Nova Telecom 3/31/2021
779-861 Dixon Cellco Partnership 5/26/2010
779-867 Rockford Multiple 4/12/2021
779-875 Joliet Multiple 7/12/2007
779-877 Verona Multiple 7/14/2020
779-879 Streator Multiple 4/18/2021
779-888 Rockford Multiple 1/28/2015
779-895 Rockford Multiple 2/1/2022
779-899 Lisbon Multiple 7/14/2020
779-900-XXXX --- 779-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
779-900 Frankfort Multiple 9/17/2019
779-901 Marengo Multiple 4/30/2015
779-902 De Kalb Multiple 3/19/2021
779-903 Braidwood Multiple 7/29/2013
779-904 Freeport Multiple 3/24/2021
779-910 De Kalb Multiple 3/18/2021
779-915 Woodstock T-Mobile USA 11/16/2016
779-922 Hooppole Multiple 7/27/2020
779-927 Marengo Multiple 1/13/2022
779-931 Sandwich Multiple 10/27/2016
779-933 Hinckley Multiple 7/27/2020
779-939 Joliet Multiple 2/3/2016
779-946 Granville Multiple 7/14/2020
779-970 Rockford Multiple 9/14/2015
779-977 Harvard Multiple 7/14/2020
779-978 Sandwich Multiple 6/4/2015
779-979 Piper City Multiple 4/19/2021
779-990 Forrest Commio 4/12/2021
779-991 Leland Multiple 8/12/2020
779-994 Crystal Lake Multiple 4/10/2013
779-997 Plattville Multiple 1/13/2022
779-999 Newark Multiple 9/24/2010
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: December 15, 2025

Cities in area code 779

City1 County Time zone1
Alden McHenry C
Amboy Lee C
Ancona Livingston C
Apple River Jo Daviess C
Arlington Bureau C
Aroma Park Kankakee C
Ashkum Iroquois C
Ashton Lee C
Baileyville Ogle C
Beaverville Iroquois C
Belvidere Boone C
Blackstone Livingston C
Bonfield Kankakee C
Bourbonnais Kankakee C
Braceville Grundy C
Bradley Kankakee C
Braidwood Will C
Buckingham Kankakee C
Bureau Bureau C
Byron Ogle C
Cabery Ford C
Caledonia Boone C
Campus Livingston C
Capron Boone C
Cedar Point La Salle C
Cedarville Stephenson C
Chadwick Carroll C
Chana Ogle C
Channahon Will C
Chatsworth Livingston C
Chebanse Iroquois C
Chenoa McLean C
Cherry Bureau C
Cherry Valley Winnebago C
Cissna Park Iroquois C
Clare Dekalb C
Claytonville Iroquois C
Clifton Iroquois C
Coal City Grundy C
Compton Lee C
Cornell Livingston C
Cortland Dekalb C
Crescent City Iroquois C
Creston Ogle C
Crystal Lake McHenry C
Cullom Livingston C
Dakota Stephenson C
Dalzell Bureau C
Dana La Salle C
Danforth Iroquois C
Davis Stephenson C
Davis Junction Ogle C
Deer Grove Whiteside C
Dekalb Dekalb C
Depue Bureau C
Dixon Lee C
Donovan Iroquois C
Dover Bureau C
Durand Winnebago C
Dwight Livingston C
Earlville La Salle C
East Dubuque Jo Daviess C
Eldena Lee C
Eleroy Stephenson C
Elizabeth Jo Daviess C
Elwood Will C
Emington Livingston C
Esmond Dekalb C
Essex Kankakee C
Fairbury Livingston C
Flanagan Livingston C
Forrest Livingston C
Forreston Ogle C
Frankfort Will C
Franklin Grove Lee C
Freeport Stephenson C
Fulton Whiteside C
Galena Jo Daviess C
Galt Whiteside C
Garden Prairie Boone C
Gardner Grundy C
Genoa Dekalb C
German Valley Stephenson C
Gilman Iroquois C
Goodwine Iroquois C
Grand Ridge La Salle C
Grant Park Kankakee C
Granville Putnam C
Graymont Livingston C
Hanover Jo Daviess C
Harmon Lee C
Harvard McHenry C
Hebron McHenry C
Hennepin Putnam C
Herscher Kankakee C
Hinckley Dekalb C
Holcomb Ogle C
Homer Glen Will C
Hooppole Henry C
Hopkins Park Kankakee C
Iroquois Iroquois C
Joliet Will C
Kankakee Kankakee C
Kasbeer Bureau C
Kempton Ford C
Kent Stephenson C
Kingston Dekalb C
Kinsman Grundy C
Kirkland Dekalb C
La Moille Bureau C
La Salle La Salle C
Ladd Bureau C
Lanark Carroll C
Leaf River Ogle C
Lee Lee C
Lee Center Lee C
Leland La Salle C
Lena Stephenson C
Leonore La Salle C
Lindenwood Ogle C
Lockport Will C
Long Point Livingston C
Lostant La Salle C
Loves Park Winnebago C
Lyndon Whiteside C
Machesney Park Winnebago C
Magnolia Putnam C
Malden Bureau C
Malta Dekalb C
Manhattan Will C
Manlius Bureau C
Manteno Kankakee C
Maple Park Kane C
Marengo McHenry C
Mark Putnam C
Marseilles La Salle C
Martinton Iroquois C
Mazon Grundy C
Mc Connell Stephenson C
Mc Nabb Putnam C
McHenry McHenry C
Mendota La Salle C
Milford Iroquois C
Milledgeville Carroll C
Millington Kendall C
Minooka Grundy C
Momence Kankakee C
Monroe Center Ogle C
Morris Grundy C
Morrison Whiteside C
Mount Carroll Carroll C
Mount Morris Ogle C
Nachusa Lee C
New Bedford Bureau C
New Lenox Will C
Newark Kendall C
Nora Jo Daviess C
Odell Livingston C
Oglesby La Salle C
Ohio Bureau C
Onarga Iroquois C
Orangeville Stephenson C
Oregon Ogle C
Ottawa La Salle C
Papineau Iroquois C
Paw Paw Lee C
Pearl City Stephenson C
Pecatonica Winnebago C
Peru La Salle C
Piper City Ford C
Plainfield Will C
Polo Ogle C
Pontiac Livingston C
Poplar Grove Boone C
Princeton Bureau C
Prophetstown Whiteside C
Putnam Putnam C
Ransom La Salle C
Reddick Kankakee C
Richmond McHenry C
Ridott Stephenson C
Ringwood McHenry C
Rochelle Ogle C
Rock City Stephenson C
Rock Falls Whiteside C
Rockford Winnebago C
Rockton Winnebago C
Romeoville Will C
Roscoe Winnebago C
Rutland La Salle C
Sandwich Dekalb C
Saunemin Livingston C
Savanna Carroll C
Scales Mound Jo Daviess C
Seatonville Bureau C
Seneca La Salle C
Serena La Salle C
Seward Winnebago C
Shabbona Dekalb C
Shannon Carroll C
Sheffield Bureau C
Sheldon Iroquois C
Sheridan La Salle C
Shirland Winnebago C
Somonauk Dekalb C
South Beloit Winnebago C
South Wilmington Grundy C
Spring Grove McHenry C
Spring Valley Bureau C
St Anne Kankakee C
Standard Putnam C
Sterling Whiteside C
Steward Lee C
Stillman Valley Ogle C
Stockland Iroquois C
Stockton Jo Daviess C
Strawn Livingston C
Streator La Salle C
Sublette Lee C
Sycamore Dekalb C
Tampico Whiteside C
Thomson Carroll C
Tiskilwa Bureau C
Toluca Marshall C
Tonica La Salle C
Triumph La Salle C
Troy Grove La Salle C
Union McHenry C
Union Hill Kankakee C
Utica La Salle C
Van Orin Bureau C
Verona Grundy C
Walnut Bureau C
Warren Jo Daviess C
Waterman Dekalb C
Watseka Iroquois C
Wedron La Salle C
Wellington Iroquois C
Wenona Marshall C
West Brooklyn Lee C
Wilmington Will C
Winnebago Winnebago C
Winslow Stephenson C
Wonder Lake McHenry C
Woodland Iroquois C
Woodstock McHenry C
Woosung Ogle C
Wyanet Bureau C
  1. Listed above are most places served by USA area code 779. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. C stands for Central Time (currently ).
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