| 779-200 | Rockford, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-201 | La Salle, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-203 | Rockford, IL | Wireless | Sprint Spectrum L.p. |
| 779-204 | Verona, IL | Landline | Broadvox-clec |
| 779-205 | Joliet, IL | Wireless | New Cingular Wireless PCS |
| 779-206 | Joliet, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-207 | Rockford, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-208 | Rockford, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-209 | Sandwich, IL | Landline | Peerless Network Of Illinois |
| 779-210 | Rockford, IL | Landline | Sbc Internet Services |
| 779-212 | Dekalb, IL | Wireless | 365 Wireless |
| 779-213 | Oglesby, IL | Landline | Peerless Network Of Illinois |
| 779-215 | Tonica, IL | Landline | Local Access LLC |
| 779-216 | Frankfort, IL | Landline | Peerless Network Of Illinois |
| 779-218 | Watseka, IL | Landline | Peerless Network Of Illinois |
| 779-220 | Crystal Lake, IL | Landline | Bandwidth.com Clec |
| 779-221 | Rockford, IL | Landline | Broadvox-clec |
| 779-222 | Dekalb, IL | Landline | Level 3 Communications |
| 779-225 | Joliet, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-226 | Polo, IL | Landline | Comcast Phone Of Illinois DBA Comco |
| 779-227 | Illinois (IL) | Wireless | Metro PCS |
| 779-228 | Mazon, IL | Landline | Peerless Network Of Illinois |
| 779-229 | Spring Valley, IL | Landline | Comcast Phone Of Illinois DBA Comco |
| 779-232 | Wilmington, IL | Landline | Teleport Communications America |
| 779-233 | Joliet, IL | Wireless | Sprint Spectrum L.p. |
| 779-234 | Plainfield, IL | Landline | Local Access LLC |
| 779-235 | Crescent City, IL | Wireless | Sbc Internet Services |
| 779-236 | Kankakee, IL | Wireless | Sprint Spectrum L.p. |
| 779-240 | Illinois (IL) | Wireless | T-mobile Usa |
| 779-245 | Sterling, IL | Wireless | Iowa Wireless Services, Lp |
| 779-251 | Dixon, IL | Landline | Centurylink Communications LLC |
| 779-253 | Metro Pcs, Inc. | Wireless | Rockford |
| 779-254 | Comcast Phone Of Illinois, Llc Dba Comco - Il | - | Rockford |
| 779-279 | Joliet, IL | Wireless | Cricket Communications |
| 779-300 | Rockford, IL | Wireless | Sprint Spectrum L.p. |
| 779-301 | Illinois (IL) | Wireless | T-mobile Usa |
| 779-302 | Cellco Partnership Dba Verizon Wireless - Il | Wireless | Rockford |
| 779-324 | Frankfort, IL | Landline | Bandwidth.com Clec |
| 779-333 | Frankfort, IL | Landline | Neutral Tandem-illinois |
| 779-348 | Rockford, IL | Landline | Teleport Communications America |
| 779-379 | Joliet, IL | Wireless | Cricket Communications |
| 779-382 | Genoa, IL | Landline | Charter Fiberlink - Illinois |
| 779-400 | Dekalb, IL | Landline | Ymax Communications Corp. |
| 779-423 | Rockford, IL | Landline | Comcast Phone Of Illinois DBA Comco |
| 779-429 | Wilmington, IL | Landline | Sbc Internet Services |
| 779-432 | Sheffield, IL | Landline | Mtco Communications |
| 779-435 | Joliet, IL | Landline | Ameritech Illinois |
| 779-444 | Wonder Lake, IL | Landline | Bandwidth.com Clec |
| 779-456 | Joliet, IL | Wireless | T-mobile Usa |
| 779-475 | Beloit, IL | Landline | Charter Fiberlink - Illinois |
| 779-500 | Rockford, IL | Landline | Teleport Communications America |
| 779-529 | Manteno, IL | Landline | Bandwidth.com Clec |
| 779-537 | Rockford, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-545 | Mt Morris, IL | Landline | Comcast Phone Of Illinois DBA Comco |
| 779-548 | Marengo, IL | Landline | Bandwidth.com Clec |
| 779-552 | Belvidere, IL | Landline | Digital Network Access Communications |
| 779-601 | Bandwidth.com Clec, Llc - Il | Landline | Rockford |
| 779-696 | Rockford, IL | Landline | Mcleodusa Telecommunications Services- Il |
| 779-701 | Bandwidth.com Clec, Llc - Il | Landline | Rockford |
| 779-702 | Illinois (IL) | Wireless | T-mobile Usa |
| 779-703 | Joliet, IL | Wireless | T-mobile Usa |
| 779-704 | Mchenry, IL | Landline | Mci Worldcom Communications |
| 779-706 | Cellco Partnership Dba Verizon Wireless - Il | Wireless | Rockford |
| 779-707 | Bandwidth.com Clec, Llc - Il | Landline | Rockford |
| 779-713 | T-mobile Usa, Inc. | Wireless | Rockford |
| 779-770 | Rockford, IL | Wireless | Cricket Communications |
| 779-771 | Rockford, IL | Wireless | Cricket Communications |
| 779-772 | Rockford, IL | Wireless | Cricket Communications |
| 779-774 | Rockford, IL | Landline | Tds Metrocom Inc.-il |
| 779-777 | Dekalb, IL | Wireless | Cricket Communications |
| 779-800 | Crystal Lake, IL | Landline | Neutral Tandem-illinois |
| 779-803 | New Lenox, IL | Landline | Bandwidth.com Clec |
| 779-804 | Mci Worldcom Communications, Inc. - Il | Landline | Rockford |
| 779-861 | Dixon, IL | Wireless | Cellco Partnership DBA Verizon Wireless |
| 779-875 | Joliet, IL | Wireless | Sprint Spectrum L.p. |
| 779-888 | Neutral Tandem-illinois, Llc - Il | Landline | Rockford |
| 779-901 | Bandwidth.com Clec, Llc - Il | Landline | Rockford |
| 779-903 | Braidwood, IL | Landline | Broadvox-clec |
| 779-970 | Cellco Partnership Dba Verizon Wireless - Il | - | Rockford |
| 779-978 | United States Cellular Corp. - Illinois | Wireless | Rockford |
| 779-994 | Crystal Lake, IL | Landline | Peerless Network Of Illinois |
| 779-999 | Newark, IL | Landline | Peerless Network Of Illinois |