| Prefix/Exchange | Location |
|---|---|
| 779-200 | Rockford |
| 779-201 | Rockford |
| 779-203 | Rockford |
| 779-204 | Rockford |
| 779-205 | Rockford |
| 779-206 | Rockford |
| 779-207 | Rockford |
| 779-208 | Rockford |
| 779-209 | Rockford |
| 779-210 | Rockford |
| 779-212 | Rockford |
| 779-213 | Rockford |
| 779-215 | Rockford |
| 779-216 | Rockford |
| 779-218 | Rockford |
| 779-220 | Rockford |
| 779-221 | Rockford |
| 779-222 | Rockford |
| 779-225 | Rockford |
| 779-226 | Rockford |
| 779-227 | Rockford |
| 779-228 | Rockford |
| 779-229 | Rockford |
| 779-232 | Rockford |
| 779-233 | Rockford |
| 779-234 | Rockford |
| 779-235 | Rockford |
| 779-236 | Rockford |
| 779-240 | Rockford |
| 779-245 | Rockford |
| 779-251 | Rockford |
| 779-253 | Rockford |
| 779-254 | Rockford |
| 779-279 | Rockford |
| 779-300 | Rockford |
| 779-301 | Rockford |
| 779-302 | Rockford |
| 779-324 | Rockford |
| 779-333 | Rockford |
| 779-348 | Rockford |
| 779-379 | Rockford |
| 779-382 | Rockford |
| 779-400 | Rockford |
| 779-423 | Rockford |
| 779-429 | Rockford |
| 779-432 | Rockford |
| 779-435 | Rockford |
| 779-444 | Rockford |
| 779-456 | Rockford |
| 779-475 | Rockford |
| 779-500 | Rockford |
| 779-529 | Rockford |
| 779-537 | Rockford |
| 779-545 | Rockford |
| 779-548 | Rockford |
| 779-552 | Rockford |
| 779-601 | Rockford |
| 779-696 | Rockford |
| 779-701 | Rockford |
| 779-702 | Rockford |
| 779-703 | Rockford |
| 779-704 | Rockford |
| 779-706 | Rockford |
| 779-707 | Rockford |
| 779-713 | Rockford |
| 779-770 | Rockford |
| 779-771 | Rockford |
| 779-772 | Rockford |
| 779-774 | Rockford |
| 779-777 | Rockford |
| 779-800 | Rockford |
| 779-803 | Rockford |
| 779-804 | Rockford |
| 779-861 | Rockford |
| 779-875 | Rockford |
| 779-888 | Rockford |
| 779-901 | Rockford |
| 779-903 | Rockford |
| 779-970 | Rockford |
| 779-978 | Rockford |
| 779-994 | Rockford |
| 779-999 | Rockford |