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Area Code 815

Area code 815 is in Illinois, USA , spanning 24 counties and serving 248 cities, including Joliet, Rockford or Plainfield; it currently uses 785 prefixes, assigned from 815-200-XXXX through 815-999-XXXX.

In service since January 01, 1947, area code 815 is the parent Numbering Plan Area in overlay complex 815/779.

The current local time is .

815 area code location on a map
© OpenStreetMap contributors
For exact NPA boundaries see official 815 area code map

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Locate any 815-NXX prefix:

NPANXX Area Served1 Date2
815-200 La Salle 6/20/2006
815-201 Sheridan 8/15/2012
815-202 Oglesby 4/8/2008
815-203 Joliet N/A
815-204 Crystal Lake N/A
815-205 Coal City 1/31/2014
815-206 Woodstock N/A
815-207 Joliet N/A
815-208 Fulton N/A
815-209 Rockford 2/4/2002
815-210 Joliet N/A
815-212 Joliet N/A
815-213 Sterling 9/29/2004
815-214 Kankakee N/A
815-215 New Lenox 2/4/2002
815-216 Kankakee N/A
815-217 De Kalb N/A
815-218 Rockford N/A
815-219 Crystal Lake 6/6/2006
815-220 La Salle N/A
815-221 Lockport N/A
815-222 Rockford N/A
815-223 La Salle N/A
815-224 La Salle N/A
815-225 Milledgeville N/A
815-226 Rockford N/A
815-227 Rockford N/A
815-228 Oglesby N/A
815-229 Rockford N/A
815-230 Plainfield N/A
815-231 Rockford N/A
815-232 Freeport N/A
815-233 Freeport N/A
815-234 Byron N/A
815-235 Freeport N/A
815-236 Woodstock N/A
815-237 Gardner N/A
815-238 Freeport N/A
815-239 Pecatonica N/A
815-240 Rock Cut 10/18/2010
815-241 Northbrook N/A
815-242 Minooka 5/2/2014
815-243 Rockford N/A
815-244 Mount Carroll N/A
815-245 Woodstock N/A
815-246 Earlville N/A
815-247 Seward N/A
815-248 Durand N/A
815-249 Grand Ridge N/A
815-250 La Salle 8/25/2006
815-251 Nelson N/A
815-252 Oglesby N/A
815-253 Kempton N/A
815-254 Plainfield N/A
815-255 Minooka 11/3/2009
815-256 Stelle N/A
815-257 Streator N/A
815-258 Joliet N/A
815-259 Thomson N/A
815-260 Joliet N/A
815-261 Crystal Lake N/A
815-262 Rockford N/A
815-263 Kankakee N/A
815-264 Waterman N/A
815-265 Gilman N/A
815-266 Freeport N/A
815-267 Plainfield N/A
815-268 Onarga N/A
815-269 Danforth N/A
815-270 Roscoe 4/24/2007
815-271 Mchenry N/A
815-272 Joliet N/A
815-273 Savanna N/A
815-274 Joliet N/A
815-275 Freeport N/A
815-276 Crystal Lake N/A
815-277 Frankfort N/A
815-278 Kankakee N/A
815-279 Kankakee N/A
815-280 Joliet N/A
815-281 Galena 6/15/2004
815-282 Rockford N/A
815-283 Waterman 3/5/2010
815-284 Dixon N/A
815-285 Dixon N/A
815-286 Hinckley N/A
815-287 Verona N/A
815-288 Dixon N/A
815-289 Rockford N/A
815-290 Minooka 2/10/2006
815-291 Freeport N/A
815-292 South Bergen N/A
815-293 Lockport N/A
815-294 La Grange N/A
815-295 Kankakee N/A
815-296 Rockford 11/20/2019
815-297 Freeport N/A
815-298 Rockford N/A
815-299 Rockford N/A
NPANXX Area Served1 Date2
815-300 New Lenox 12/22/2010
815-301 Crystal Lake N/A
815-302 Joliet N/A
815-303 Princeton N/A
815-304 Kankakee N/A
815-305 Gardner N/A
815-306 Lockport N/A
815-307 Mchenry N/A
815-308 Woodstock N/A
815-309 Shannon 7/18/2006
815-310 Utica N/A
815-312 Rockford 12/15/2008
815-313 Ottawa N/A
815-314 Manhattan N/A
815-315 Rockford N/A
815-316 Rockford N/A
815-317 Crescent City N/A
815-318 Morris N/A
815-319 Rockford N/A
815-320 New Lenox 4/28/2009
815-321 Woodstock N/A
815-322 Mchenry N/A
815-323 Belvidere 2/10/2005
815-324 Ottawa 1/8/2010
815-325 Joliet N/A
815-326 Oglesby N/A
815-327 Plainfield N/A
815-328 Lockport N/A
815-329 Rockford 3/11/2013
815-330 Crescent City N/A
815-331 Mchenry N/A
815-332 Cherry Valley N/A
815-333 Woodstock N/A
815-334 Woodstock N/A
815-335 Winnebago N/A
815-336 Coleta N/A
815-337 Woodstock N/A
815-338 Woodstock N/A
815-339 Granville N/A
815-340 La Moille 8/25/2006
815-341 Joliet N/A
815-342 Joliet N/A
815-343 Oglesby N/A
815-344 Mchenry N/A
815-345 Woodstock N/A
815-346 Gardner N/A
815-347 Woodstock N/A
815-348 Kankakee 10/16/2009
815-349 Mchenry N/A
815-350 Franklin Grove N/A
815-351 Kankakee N/A
815-352 Kankakee N/A
815-353 Woodstock N/A
815-354 Woodstock N/A
815-355 Woodstock N/A
815-356 Crystal Lake N/A
815-357 Seneca N/A
815-358 Cornell N/A
815-359 Harmon N/A
815-360 Sublette N/A
815-361 Manhattan N/A
815-362 German Valley N/A
815-363 Mchenry N/A
815-364 Morris N/A
815-365 Reddick N/A
815-366 Ottawa N/A
815-367 Winslow N/A
815-368 Lostant N/A
815-369 Lena N/A
815-370 Kankakee N/A
815-371 Utica N/A
815-372 Lockport N/A
815-373 Elwood 11/4/2009
815-374 Dwight 11/4/2009
815-375 De Kalb N/A
815-376 Ohio N/A
815-377 Crescent City N/A
815-378 Rockford N/A
815-379 Walnut N/A
815-380 Sterling N/A
815-381 Rockford N/A
815-382 Woodstock N/A
815-383 Crescent City N/A
815-384 Creston N/A
815-385 Mchenry N/A
815-386 Kankakee N/A
815-387 Rockford N/A
815-388 Mchenry N/A
815-389 South Beloit N/A
815-390 Braidwood 10/14/2004
815-391 Rockford N/A
815-392 Kinsman N/A
815-393 Monroe Center N/A
815-394 Rockford N/A
815-395 Rockford N/A
815-396 Steward N/A
815-397 Rockford N/A
815-398 Rockford N/A
815-399 Rockford N/A
NPANXX Area Served1 Date2
815-400 Morrison 2/15/2010
815-401 Kankakee N/A
815-402 Galena N/A
815-403 Mchenry N/A
815-404 Crystal Lake N/A
815-405 Joliet N/A
815-406 Byron N/A
815-407 Lockport N/A
815-408 Utica N/A
815-409 Joliet 8/18/2005
815-410 La Salle 2/4/2002
815-412 Frankfort N/A
815-413 Morris N/A
815-414 Earlville 10/14/2004
815-415 Seneca N/A
815-416 Morris N/A
815-417 Braidwood N/A
815-418 Manhattan N/A
815-419 Pontiac 3/19/2003
815-420 Rockford N/A
815-421 Herscher N/A
815-422 St Anne N/A
815-423 Elwood N/A
815-424 Elwood N/A
815-425 Crystal Lake N/A
815-426 Herscher N/A
815-427 St Anne N/A
815-428 Martinton N/A
815-429 Sheldon N/A
815-430 Mchenry N/A
815-431 Ottawa N/A
815-432 Watseka N/A
815-433 Ottawa N/A
815-434 Ottawa N/A
815-435 Beaverville N/A
815-436 Plainfield N/A
815-437 Putnam N/A
815-438 Tampico N/A
815-439 Plainfield N/A
815-440 Dixon N/A
815-441 Sterling N/A
815-442 Tonica N/A
815-443 Pearl City N/A
815-444 Crystal Lake N/A
815-445 Manlius N/A
815-446 Cedarpoint N/A
815-447 Depue N/A
815-448 Mazon N/A
815-449 Dakota N/A
815-450 Momence 7/27/2004
815-451 Woodstock N/A
815-452 Toluca N/A
815-453 Ashton N/A
815-454 Sheffield N/A
815-455 Crystal Lake N/A
815-456 Franklin Grove N/A
815-457 Cissna Park N/A
815-458 Braidwood N/A
815-459 Crystal Lake N/A
815-460 Joliet N/A
815-461 Lockport N/A
815-462 New Lenox N/A
815-463 New Lenox N/A
815-464 Frankfort N/A
815-465 Grant Park N/A
815-466 Grant Park N/A
815-467 Minooka N/A
815-468 Manteno N/A
815-469 Frankfort N/A
815-470 Rockford N/A
815-471 Watseka N/A
815-472 Momence N/A
815-473 Woodland N/A
815-474 Joliet N/A
815-475 Plattville N/A
815-476 Wilmington N/A
815-477 Crystal Lake N/A
815-478 Manhattan N/A
815-479 Crystal Lake N/A
815-480 Rockford 3/22/2001
815-481 La Grange N/A
815-482 Woodstock N/A
815-483 Joliet N/A
815-484 Rockford N/A
815-485 New Lenox N/A
815-486 Donovan N/A
815-487 Plainfield N/A
815-488 La Grange N/A
815-489 Rockford N/A
815-490 Rockford N/A
815-491 Rockford 3/13/2013
815-492 Apple River N/A
815-493 Lanark N/A
815-494 Rockford N/A
815-495 Leland N/A
815-496 Sheridan N/A
815-497 Compton N/A
815-498 Somonauk N/A
815-499 Sterling N/A
NPANXX Area Served1 Date2
815-500 Marseilles N/A
815-501 De Kalb N/A
815-502 Woodstock N/A
815-503 Mendota N/A
815-504 Gardner N/A
815-505 Rockford N/A
815-506 Union 2/27/2002
815-507 Momence 12/28/2001
815-508 De Kalb 6/16/2004
815-509 Rockford N/A
815-510 Streator 1/8/2010
815-512 Lockport N/A
815-513 Morris 2/27/2002
815-514 Joliet 1/24/2001
815-515 Watseka 2/4/2002
815-516 Rockford 1/24/2001
815-517 De Kalb 6/28/2004
815-518 Coal City 10/23/2001
815-519 Rockford N/A
815-520 Rockford N/A
815-521 Minooka N/A
815-522 Kirkland N/A
815-523 Kankakee N/A
815-524 Lockport N/A
815-525 South Beloit N/A
815-526 Crystal Lake N/A
815-527 Woodstock N/A
815-528 Mchenry N/A
815-529 Woodstock N/A
815-530 Joliet N/A
815-531 Joliet N/A
815-532 Morris N/A
815-533 La Grange N/A
815-534 Frankfort N/A
815-535 Sterling N/A
815-536 La Grange N/A
815-537 Prophetstown N/A
815-538 Mendota N/A
815-539 Mendota N/A
815-540 Rockford N/A
815-541 Freeport N/A
815-542 Thomas N/A
815-543 Rockford N/A
815-544 Belvidere N/A
815-545 Joliet N/A
815-546 Joliet N/A
815-547 Belvidere N/A
815-548 Sterling N/A
815-549 Kankakee N/A
815-550 Grant Park N/A
815-551 Lanark 8/1/2018
815-552 Lockport 4/10/2001
815-553 Joliet 4/10/2001
815-554 East Dubuque N/A
815-556 Plainfield 4/10/2001
815-557 Joliet N/A
815-558 Rockford N/A
815-559 Chenoa N/A
815-560 Harvard 5/3/2002
815-561 Rochelle N/A
815-562 Rochelle N/A
815-563 Cedarville N/A
815-564 Sterling N/A
815-565 Savanna N/A
815-566 Belvidere 6/21/2002
815-567 Campus N/A
815-568 Marengo N/A
815-569 Capron N/A
815-570 Sandwich 8/21/2002
815-571 Shannon 4/21/2006
815-572 Marengo N/A
815-573 Kankakee 2/27/2002
815-574 Harmon N/A
815-575 Woodstock N/A
815-576 Polo N/A
815-577 Plainfield N/A
815-578 Mchenry N/A
815-579 La Salle N/A
815-580 Cherry Valley 3/18/2003
815-581 Spring Grove 10/6/2005
815-582 Joliet 10/6/2005
815-583 Morrison N/A
815-584 Dwight N/A
815-585 Morris 5/3/2002
815-586 Ransom N/A
815-587 Ottawa 4/2/2002
815-588 Lockport N/A
815-589 Fulton N/A
815-590 Sterling 7/14/2003
815-591 Hanover N/A
815-592 Kankakee N/A
815-593 De Kalb N/A
815-594 Apple River N/A
815-595 Oregon 10/2/2003
815-596 Marengo 2/10/2006
815-597 Garden Prairie N/A
815-598 Massbach N/A
815-599 Freeport N/A
NPANXX Area Served1 Date2
815-600 Joliet 7/14/2003
815-601 Rockford N/A
815-602 Kankakee N/A
815-603 Joliet 9/28/2001
815-604 Belvidere 7/31/2019
815-605 Grant Park 4/2/2002
815-606 Ottawa N/A
815-607 Pearl City 10/01/2024
815-608 Rockford 9/30/2002
815-609 Plainfield 10/24/2001
815-610 Hennepin 10/30/2024
815-613 Dixon 8/30/2019
815-614 Kankakee N/A
815-615 Mendota 10/31/2001
815-616 Freeport 1/7/2004
815-617 Ottawa N/A
815-618 Freeport 12/21/2006
815-619 Rockton 5/27/2003
815-620 Minooka 10/31/2018
815-621 Rockford N/A
815-622 Sterling N/A
815-623 Roscoe N/A
815-624 Rockton N/A
815-625 Sterling N/A
815-626 Sterling N/A
815-627 Paw Paw N/A
815-628 West Brooklyn N/A
815-629 Shirland N/A
815-630 Joliet 7/24/2006
815-631 Sterling N/A
815-632 Sterling N/A
815-633 Rockford N/A
815-634 Coal City N/A
815-635 Chatsworth N/A
815-636 Rockford N/A
815-637 Rockford N/A
815-638 La Moille N/A
815-639 Rockford N/A
815-640 Ottawa 12/28/2001
815-641 Joliet 1/21/2008
815-642 Minooka N/A
815-643 Dover N/A
815-644 Crescent City N/A
815-645 Stilman Valley N/A
815-646 Tiskilwa N/A
815-647 Cullom N/A
815-648 Hebron N/A
815-649 Gardner N/A
815-650 Freeport N/A
815-651 Joliet N/A
815-652 Grand Detour N/A
815-653 Wonder Lake N/A
815-654 Rockford N/A
815-655 Coal City 2/18/2019
815-656 Freeport 6/26/2002
815-657 Forrest N/A
815-658 Newark 8/2/2019
815-659 Bureau N/A
815-660 Lockport N/A
815-661 Morris N/A
815-662 Momence N/A
815-663 Spring Valley N/A
815-664 Spring Valley N/A
815-665 Ottawa N/A
815-666 Joliet 8/30/2006
815-667 Utica N/A
815-668 Rockford 4/2/2009
815-669 Mchenry N/A
815-670 Rockford N/A
815-671 Joliet N/A
815-672 Streator N/A
815-673 Streator N/A
815-674 Streator N/A
815-675 Spring Grove N/A
815-676 Plainfield N/A
815-677 Dixon 3/17/2005
815-678 Richmond N/A
815-679 Mchenry N/A
815-680 Manhattan N/A
815-681 Oglesby 7/30/2010
815-682 Stockland N/A
815-683 Crescent City N/A
815-684 Chadwick N/A
815-685 Joliet N/A
815-686 Piper City N/A
815-687 Woodstock N/A
815-688 Strawn N/A
815-689 Cullom N/A
815-690 Joliet N/A
815-691 Utica N/A
815-692 Fairbury N/A
815-693 Joliet N/A
815-694 Clifton N/A
815-695 Newark N/A
815-696 Roscoe 5/27/2003
815-697 Chebanse N/A
815-698 Ashkum N/A
815-699 Wyanet N/A
NPANXX Area Served1 Date2
815-701 Woodstock 4/2/2002
815-702 Saunemin N/A
815-703 Rockford 6/4/2002
815-704 South Beloit 2/23/2001
815-705 Morris 12/28/2001
815-706 Rockford 9/3/2019
815-707 Gilman 12/6/2001
815-708 Rockford 6/23/2006
815-709 Coal City 12/28/2001
815-710 Morris 1/24/2001
815-712 La Salle 7/5/2002
815-713 Rockford 9/28/2001
815-714 Joliet N/A
815-715 Joliet 5/22/2001
815-716 Sterling 10/31/2001
815-717 New Lenox N/A
815-718 Sterling 10/22/2002
815-719 Princeton 7/5/2002
815-720 Rockford N/A
815-721 Rockford N/A
815-722 Joliet N/A
815-723 Joliet N/A
815-724 Joliet N/A
815-725 Joliet N/A
815-726 Joliet N/A
815-727 Joliet N/A
815-728 Wonder Lake N/A
815-729 Joliet N/A
815-730 Joliet N/A
815-731 Plainfield 2/16/2006
815-732 Oregon N/A
815-733 Plainfield N/A
815-734 Mount Morris N/A
815-735 Joliet N/A
815-736 Lisbon N/A
815-737 South Sharon N/A
815-738 Leaf River N/A
815-739 Sycamore N/A
815-740 Joliet N/A
815-741 Joliet N/A
815-742 Rockford N/A
815-743 Graymont N/A
815-744 Joliet N/A
815-745 Warren N/A
815-746 Marseilles 5/13/2008
815-747 East Dubuque N/A
815-748 De Kalb N/A
815-749 Lockport 8/19/2022
815-750 Marseilles 1/23/2003
815-751 De Kalb N/A
815-752 De Kalb N/A
815-753 De Kalb N/A
815-754 De Kalb N/A
815-755 Seneca 1/8/2016
815-756 De Kalb N/A
815-757 De Kalb N/A
815-758 De Kalb N/A
815-759 Mchenry N/A
815-760 Bureau 10/25/2005
815-761 De Kalb N/A
815-762 De Kalb N/A
815-763 Joliet 10/11/2022
815-764 De Kalb N/A
815-765 Poplar Grove N/A
815-766 De Kalb N/A
815-767 La Grange 4/16/2001
815-768 Joliet N/A
815-769 Seneca 4/27/2001
815-770 Harvard 2/13/2006
815-771 Ashkum N/A
815-772 Morrison N/A
815-773 Joliet N/A
815-774 Joliet N/A
815-775 Woodstock N/A
815-776 Galena N/A
815-777 Galena N/A
815-778 Lyndon N/A
815-779 Plainfield 02/08/2024
815-780 La Salle 8/22/2001
815-781 Chebanse N/A
815-782 Plainfield N/A
815-783 Gilman N/A
815-784 Genoa N/A
815-785 Watseka N/A
815-786 Sandwich N/A
815-787 De Kalb N/A
815-788 Crystal Lake 3/22/2001
815-789 Orangeville N/A
815-790 Woodstock N/A
815-791 Joliet 7/24/2001
815-792 Harding N/A
815-793 De Kalb 6/25/2001
815-794 Marseilles N/A
815-795 Marseilles N/A
815-796 Flanagan N/A
815-797 Somonauk 12/6/2001
815-798 Milledgeville N/A
815-799 Manlius 8/22/2001
NPANXX Area Served1 Date2
815-800 Poplar Grove 3/24/2010
815-801 Freeport N/A
815-802 Kankakee 9/28/2001
815-803 Byron 3/22/2001
815-804 Pecatonica N/A
815-805 Durand N/A
815-806 Frankfort N/A
815-807 German Valley N/A
815-808 Winslow N/A
815-809 Lena N/A
815-810 Pearl City N/A
815-812 Dakota N/A
815-813 Apple River N/A
815-814 Woodstock 4/27/2001
815-815 Ladd 09/30/2024
815-816 Cedarville N/A
815-817 Hanover N/A
815-818 Warren N/A
815-819 Orangeville N/A
815-820 Elizabeth N/A
815-821 Freeport 5/22/2001
815-822 Streator 4/27/2001
815-823 Joliet N/A
815-824 Shabbona N/A
815-825 Malta N/A
815-826 Somonauk 5/12/2004
815-827 Maple Park N/A
815-828 Minooka 8/22/2001
815-829 Chadwick N/A
815-830 Oglesby N/A
815-831 Davis N/A
815-832 Saunemin N/A
815-833 Mcconnell N/A
815-834 Lockport N/A
815-835 Dixon N/A
815-836 Lockport N/A
815-837 Forreston N/A
815-838 Lockport N/A
815-839 Kankakee N/A
815-840 Stockton N/A
815-841 Mount Morris N/A
815-842 Pontiac N/A
815-843 Ashton N/A
815-844 Pontiac N/A
815-845 Scales Mound N/A
815-846 Joliet N/A
815-847 Rockford 4/18/2005
815-848 Pontiac N/A
815-849 Sublette N/A
815-850 Seward N/A
815-851 Kankakee N/A
815-852 Scales Mound N/A
815-853 Wenona N/A
815-854 Long Point N/A
815-855 Milledgeville 4/2/2002
815-856 Leonore N/A
815-857 Amboy N/A
815-858 Elizabeth N/A
815-859 Rochelle 9/30/2019
815-860 Elwood 3/5/2010
815-861 Woodstock N/A
815-862 Richmond 11/18/2008
815-863 Rutland N/A
815-864 Shannon N/A
815-865 Davis N/A
815-866 Princeton N/A
815-867 Pontiac 4/27/2001
815-868 Mcconnell N/A
815-869 Magnolia N/A
815-870 Rockford N/A
815-871 Rockford N/A
815-872 Princeton N/A
815-873 New Milford N/A
815-874 New Milford N/A
815-875 Princeton N/A
815-876 Princeton N/A
815-877 Rockford N/A
815-878 Princeton N/A
815-879 Princeton N/A
815-880 Woodstock 1/24/2001
815-881 Oregon N/A
815-882 Mcnabb N/A
815-883 Oglesby N/A
815-884 Earlville 3/23/2010
815-885 Rock Cut N/A
815-886 Lockport N/A
815-887 Harvard 5/3/2002
815-888 Rochelle 11/27/2006
815-889 Milford N/A
815-890 New Milford 5/27/2003
815-891 Winnebago 6/25/2001
815-892 Stilman Valley 11/21/2019
815-893 Crystal Lake 12/30/2004
815-894 Ladd N/A
815-895 Sycamore N/A
815-896 Shirland 7/24/2001
815-897 Lyndon N/A
815-898 Massbach 2/23/2001
815-899 Sycamore N/A
NPANXX Area Served1 Date2
815-900 Mchenry 8/4/2010
815-901 De Kalb 2/14/2005
815-902 Thomson 6/25/2001
815-903 Mchenry 2/27/2002
815-904 Rockford 8/31/2006
815-905 Lockport 2/27/2002
815-906 Mount Carroll 4/21/2006
815-907 Manteno 12/6/2001
815-908 Freeport N/A
815-909 De Kalb 5/22/2001
815-910 Mendota 6/25/2001
815-912 Belvidere 9/28/2001
815-913 Chadwick N/A
815-914 Rockford N/A
815-915 Princeton 12/28/2001
815-916 Plattville N/A
815-917 Rochelle N/A
815-918 Clifton 8/22/2001
815-919 Joliet 2/23/2001
815-920 Cornell 11/22/2005
815-921 Rockford 4/27/2001
815-922 Kankakee N/A
815-923 Union N/A
815-924 Prophetstown N/A
815-925 Hennepin N/A
815-926 Wilmington 5/22/2001
815-927 Joliet N/A
815-928 Kankakee N/A
815-929 Kankakee N/A
815-930 Elizabeth 6/4/2002
815-931 Joliet N/A
815-932 Kankakee N/A
815-933 Kankakee N/A
815-934 Emington N/A
815-935 Kankakee N/A
815-936 Kankakee N/A
815-937 Kankakee N/A
815-938 Forreston N/A
815-939 Kankakee N/A
815-940 Gardner 5/3/2002
815-941 Morris N/A
815-942 Morris N/A
815-943 Harvard N/A
815-944 Momence N/A
815-945 Chenoa N/A
815-946 Polo N/A
815-947 Stockton N/A
815-948 Hooppole N/A
815-949 Cabery N/A
815-951 Amboy N/A
815-952 Lanark 7/18/2006
815-953 Kankakee N/A
815-954 Kankakee N/A
815-955 Joliet 7/5/2002
815-956 Morrison N/A
815-957 Rockton 2/22/2005
815-960 Leaf River 6/4/2002
815-961 Rockford N/A
815-962 Rockford N/A
815-963 Rockford N/A
815-964 Rockford N/A
815-965 Rockford N/A
815-966 Rockford N/A
815-967 Rockford N/A
815-968 Rockford N/A
815-969 Rockford N/A
815-970 Sycamore 7/5/2002
815-971 Rockford N/A
815-972 Rockford N/A
815-973 Dixon N/A
815-974 Hebron 7/3/2018
815-975 Belvidere 9/3/2002
815-977 Rockford 6/25/2003
815-978 Rockford N/A
815-979 Rockford N/A
815-980 Rockford 6/15/2006
815-981 De Kalb 9/30/2002
815-982 Tampico N/A
815-983 Rockford N/A
815-984 Wellington N/A
815-985 Rockford N/A
815-986 Rockford N/A
815-987 Rockford N/A
815-988 Rockford N/A
815-989 Prophetstown 1/4/2005
815-990 Freeport 10/22/2002
815-991 Sycamore N/A
815-992 Streator 4/21/2005
815-993 Oglesby 9/22/2006
815-994 Dixon 4/14/2003
815-995 De Kalb 6/10/2009
815-996 Savanna N/A
815-997 Rockford 3/26/2003
815-998 Odell N/A
815-999 Joliet 7/14/2003
  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. Assignment date. N/A - mostly central office codes assigned before 2001.
  3. NXX prefixes last updated: March 1st, 2025

Cities in area code 815

City1 County Time Zone2
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 815. 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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