815 – Illinois Area Codes
Number structure
| +1 | 815 | 206 220 223 224 225 226 ... | •••• |
| United States | Illinois | Code of City | Number |
List of area codes
| City | Area Code |
|---|---|
| Amboy | 815-857 |
| Belvidere | 815-544, 815-547 |
| Braidwood | 815-458 |
| Byron | 815-234 |
| Chenoa | 815-945 |
| Cissna Park | 815-457 |
| Clifton | 815-694 |
| Coal City | 815-634 |
| Crystal Lake | 815-356, 815-444, 815-455, 815-459, 815-477, 815-479, 815-788, 815-893 |
| DeKalb | 815-748, 815-754, 815-756, 815-758, 815-787 |
| Dixon | 815-284, 815-285, 815-288 |
| Durand | 815-248 |
| Dwight | 815-584 |
| Earlville | 815-246 |
| East Dubuque | 815-747 |
| Elizabeth | 815-858 |
| Elwood | 815-423 |
| Fairbury | 815-692 |
| Forrest | 815-657 |
| Forreston | 815-938 |
| Frankfort | 815-464, 815-469, 815-806 |
| Freeport | 815-232, 815-233, 815-235, 815-599 |
| Fulton | 815-589 |
| Galena | 815-776, 815-777 |
| Gardner | 815-237 |
| Genoa | 815-784 |
| Gilman | 815-265 |
| Granville | 815-339 |
| Harvard | 815-943 |
| Hebron | 815-648 |
| Herscher | 815-426 |
| Hinckley | 815-286 |
| Joliet | 815-72•, 815-730, 815-740, 815-741, 815-744, 815-773, 815-774 |
| Kankakee | 815-937 |
| Lanark | 815-493 |
| Lena | 815-369 |
| Lockport | 815-588, 815-834, 815-836, 815-838 |
| Manhattan | 815-478 |
| Manteno | 815-468 |
| Marengo | 815-568 |
| Marseilles | 815-795 |
| McHenry | 815-344, 815-363, 815-385, 815-578, 815-759 |
| Mendota | 815-538, 815-539 |
| Milledgeville | 815-225 |
| Momence | 815-472 |
| Morris | 815-416, 815-941, 815-942 |
| Morrison | 815-772 |
| Mount Carroll | 815-244 |
| Mount Morris | 815-734 |
| New Lenox | 815-462, 815-463, 815-485 |
| Newark | 815-695 |
| North Utica | 815-667 |
| Oglesby | 815-883 |
| Oregon | 815-732 |
| Ottawa | 815-431, 815-433, 815-434 |
| Pecatonica | 815-239 |
| Peru | 815-220, 815-223, 815-224 |
| Plainfield | 815-230, 815-254, 815-267, 815-436, 815-439, 815-577, 815-609 |
| Polo | 815-946 |
| Pontiac | 815-842, 815-844 |
| Poplar Grove | 815-765 |
| Princeton | 815-872, 815-875, 815-879 |
| Prophetstown | 815-537 |
| Richmond | 815-678 |
| Rochelle | 815-561, 815-562 |
| Rockford | 815-226, 815-227, 815-229, 815-316, 815-332, 815-39•, 815-484, 815-489, 815-490, 815-708, 815-874, 815-96•, 815-971, 815-977, 815-986, 815-987 |
| Rockton | 815-624 |
| Romeoville | 815-293, 815-372, 815-886 |
| Roscoe | 815-623 |
| Sandwich | 815-786 |
| Savanna | 815-273 |
| Seneca | 815-357 |
| Shabbona | 815-824 |
| Sheridan | 815-496 |
| Somonauk | 815-498 |
| South Beloit | 815-389 |
| Spring Grove | 815-675 |
| Spring Valley | 815-663, 815-664 |
| Sterling | 815-622, 815-625, 815-626 |
| Stockton | 815-947 |
| Streator | 815-672, 815-673 |
| Sycamore | 815-895, 815-899 |
| Union | 815-923 |
| Walnut | 815-379 |
| Warren | 815-745 |
| Watseka | 815-432 |
| Wilmington | 815-476 |
| Winnebago | 815-335 |
| Wonder Lake | 815-653, 815-728 |
| Woodstock | 815-206, 815-334, 815-337, 815-338 |
Local time in Illinois
| Timezone | GMT | Time |
|---|---|---|
| America/Chicago | -06:00 | [loading...] |
Map of Illinois
Other area codes in United States
Area Codes Search Notes
Fixed phone numbers in the United States, state Illinois (area code 815) are comprised of a single country code (+1), a 3 digit area code, a 3 digit local office code (or region code), and a 4 digit line code. Making a call with the wrong country, area, or region code can be costly. Browse our sites area and region codes by state and city to ensure you have the correct information for your calls. Each states page contains a list of the cities within that state and the numbers of that area. Also available are local times. So you don’t have to worry about calling too late or early again.
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