779 Area Code
The 779 area code is a telephone area code serving most of northern Illinois.
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The 779 area code is a telephone area code serving most of northern Illinois.
Federal Data
State Data
County Data
City Data
Phone numbers with this area code prefix originate from most of northern Illinois, outside the Quad Cities areas. This includes the Joliet area and portions of Chicago’s western and northwestern suburbs.
Area code 779 operates as part of an overlay complex with area code 815. While 815 was one of the original Illinois area codes assigned in 1947, 779 was introduced to the same numbering plan area in 2009. This overlay system means that both area codes serve the same geographic region. As a result, ten-digit dialing (including the area code) was required for all calls within the 815 area beginning on February 17, 2007, a month before area code 779 was activated.
Area code 779 is a general purpose code which was placed in service on March 17, 2007.
Our reverse phone lookup will analyze the three-digit prefix of any 779 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Illinois geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 5 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 4 |
| ONVOY, LLC | 4 |
| SPRINT SPECTRUM, L.P. | 4 |
| COMCAST IP PHONE, LLC | 3 |
| PEERLESS NETWORK OF ILLINOIS, LLC - IL | 3 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 3 |
| BANDWIDTH.COM CLEC, LLC - IL | 2 |
| TELNYX LLC | 2 |
| AT&T CORP. | 1 |
| CHARTER FIBERLINK - ILLINOIS, LLC - IL | 1 |
| DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL | 1 |
| ILLINOIS BELL TEL CO | 1 |
| LOCAL ACCESS LLC - IL | 1 |
| MCLEODUSA TELECOMMUNICATION SERVICES, INC. - IL | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 1 |
| T-MOBILE USA, INC. | 1 |
| TDS METROCOM, INC. - IL | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| ROCKFORD | 12 |
| JOLIET | 5 |
| CRYSTAL LK | 2 |
| FRANKFORT | 2 |
| SO BELOIT | 2 |
| WILMINGTON | 2 |
| BELVIDERE | 1 |
| BRAIDWOOD | 1 |
| DE KALB | 1 |
| GALENA | 1 |
| KANKAKEE | 1 |
| LA SALLE | 1 |
| NEWMILFORD | 1 |
| PLAINFIELD | 1 |
| POLO | 1 |
| STERLING | 1 |
| SYCAMORE | 1 |
| VERONA | 1 |
| WATSEKA | 1 |
| WOODSTOCK | 1 |
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