Area Code 815
Illinois area code 815 has been in service since 1947. It has 560 landlines and 165 wireless prefixes (exchanges) serviced by 63 carriers. It covers 27 counties, 835 ZIP codes, and 232 cities, including Rockford, Joliet, Plainfield, Crystal Lake, Mchenry, Kankakee, Freeport, Dekalb, and New Lenox.
- State:
- Illinois
- Time Zone:
- Central (7:20 pm)
Area Code (815) has 725 prefixes
| Prefix | County | City | Company/Carrier | Line Type |
|---|---|---|---|---|
| (815) 204- | Stephenson | Freeport | Heartland Communications, Inc. | Landline |
| (815) 206- | McHenry | Bull Valley | Ameritech Illinois | Landline |
| (815) 207- | Will | Crest Hill | At&t Local | Landline |
| (815) 208- | Whiteside | East Clinton | Sprint Communications Compa... | Landline |
| (815) 209- | Winnebago | Rockford | Level 3 Communications, Llc... | Landline |
| (815) 210- | Will | Plainfield | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 212- | Cook | Chicago | T-mobile Usa, Inc. | Cell Phone |
| (815) 213- | Lee | Sublette | United States Cellular Corp. | Cell Phone |
| (815) 214- | Kankakee | Bradley | Rcn Telecom Services Of Ill... | Landline |
| (815) 215- | Will | New Lenox | Globalcom, Inc.-il | Landline |
| (815) 216- | Cook | Schaumburg | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 217- | Dekalb | Dekalb | Digital Network Access Comm... | Landline |
| (815) 218- | Winnebago | Rockford | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 219- | Lake | Hainesville | United States Cellular Corp. | Cell Phone |
| (815) 220- | La Salle | Peru | Ameritech Illinois | Landline |
| (815) 221- | Will | Romeoville | Teleport Communications Gro... | Landline |
| (815) 222- | Winnebago | Rockford | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 223- | La Salle | Peru | Ameritech Illinois | Landline |
| (815) 224- | La Salle | Peru | Ameritech Illinois | Landline |
| (815) 225- | Carroll | Milledgeville | Citizens Telecom Co Illinoi... | Landline |
| (815) 226- | Winnebago | Rockford | Ameritech Illinois | Landline |
| (815) 227- | Winnebago | Rockford | Ameritech Illinois | Landline |
| (815) 228- | La Salle | Brickton | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 229- | Winnebago | Rockford | Ameritech Illinois | Landline |
| (815) 230- | Will | Plainfield | Broadwing Communications, L... | Landline |
| (815) 231- | Winnebago | Rockford | Ameritech Illinois | Landline |
| (815) 232- | Stephenson | Freeport | Verizon North Inc.-il (contel) | Landline |
| (815) 233- | Stephenson | Freeport | Verizon North Inc.-il (contel) | Landline |
| (815) 234- | Ogle | Byron | Verizon North Inc.-il | Landline |
| (815) 235- | Stephenson | Freeport | Verizon North Inc.-il (contel) | Landline |
| (815) 236- | McHenry | Bull Valley | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 237- | Grundy | Gardner | Ameritech Illinois | Landline |
| (815) 238- | Stephenson | Freeport | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 239- | Winnebago | Pecatonica | Verizon North Inc.-il (contel) | Landline |
| (815) 241- | Winnebago | Morristown | American Messaging (am), Inc. | Cell Phone |
| (815) 242- | Will | New Lenox | Heartland Communications, Inc. | Landline |
| (815) 243- | Winnebago | Rockford | United States Cellular Corp. | Cell Phone |
| (815) 244- | Carroll | Mount Carroll | Gallatin River Communications | Landline |
| (815) 245- | McHenry | Bull Valley | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 246- | La Salle | Earlville | Verizon North Inc.-il | Landline |
| (815) 247- | Winnebago | Pecatonica | Verizon North Inc.-il (contel) | Landline |
| (815) 248- | Stephenson | Davis | Verizon North Inc.-il (contel) | Landline |
| (815) 249- | La Salle | Farm Ridge | Verizon North Inc.-il | Landline |
| (815) 250- | La Salle | Dimmick | Insight Phone Of Illinois, ... | Landline |
| (815) 251- | Lee | Dixon | Gallatin River Communications | Landline |
| (815) 252- | La Salle | Peru | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 253- | Ford | Kempton | Frontier Communications Of ... | Landline |
| (815) 254- | Will | Plainfield | Ameritech Illinois | Landline |
| (815) 255- | Dupage | Lisle | Adbeep, Llc | Cell Phone |
| (815) 256- | Ford | Cabery | Stelle Telephone Co. | Landline |
| (815) 257- | La Salle | Peru | Illinois Valley Cellular Rs... | Cell Phone |
| (815) 258- | Kankakee | Grant Park | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 259- | Carroll | Thompson | Gallatin River Communications | Landline |
| (815) 260- | Bureau | Coal Hollow | United States Cellular Corp. | Cell Phone |
| (815) 261- | McHenry | Crystal Lake | Mci Worldcom Communications... | Landline |
| (815) 262- | Winnebago | Rockford | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 263- | Will | Crest Hill | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 264- | Dekalb | McGirr | Verizon North Inc.-il (contel) | Landline |
| (815) 265- | Iroquois | Gilman | Ameritech Illinois | Landline |
| (815) 266- | Stephenson | Freeport | Verizon North Inc.-il (contel) | Landline |
| (815) 267- | Will | Plainfield | Mci Worldcom Communications... | Landline |
| (815) 268- | Iroquois | Onarga | Ameritech Illinois | Landline |
| (815) 269- | Iroquois | Danforth | Verizon South Inc.-il (alltel) | Landline |
| (815) 270- | Winnebago | Roscoe | Charter Fiberlink - Illinoi... | Landline |
| (815) 271- | McHenry | Bull Valley | Mci Worldcom Communications... | Landline |
| (815) 272- | Will | Joliet | Mci Worldcom Communications... | Landline |
| (815) 273- | Carroll | Savanna | Gallatin River Communications | Landline |
| (815) 274- | Kendall | Oswego | New Cingular Wireless Pcs, ... | Cell Phone |
| (815) 275- | Stephenson | Freeport | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 276- | McHenry | Bull Valley | Teleport Communications Gro... | Landline |
| (815) 277- | Will | Frankfort | Teleport Communications Gro... | Landline |
| (815) 280- | Will | Joliet | Teleport Communications Gro... | Landline |
| (815) 281- | Carroll | Savanna | United States Cellular Corp. | Cell Phone |
| (815) 282- | Winnebago | Loves Park | Ameritech Illinois | Landline |
| (815) 283- | Vermilion | Hoopeston | A Beep Llc | Landline |
| (815) 284- | Lee | Dixon | Gallatin River Communications | Landline |
| (815) 285- | Lee | Dixon | Gallatin River Communications | Landline |
| (815) 286- | Dekalb | Hinckley | Verizon North Inc.-il (contel) | Landline |
| (815) 287- | Grundy | Verona | Ameritech Illinois | Landline |
| (815) 288- | Lee | Dixon | Gallatin River Communications | Landline |
| (815) 289- | Winnebago | Rockford | United States Cellular Corp... | Cell Phone |
| (815) 290- | Grundy | Minooka | Sbc Internet Services, Inc. | Landline |
| (815) 291- | Stephenson | Freeport | United States Cellular Corp... | Cell Phone |
| (815) 292- | Boone | Blaine | Bergen Telephone Co. - Illi... | Landline |
| (815) 293- | Will | Romeoville | Ameritech Illinois | Landline |
| (815) 294- | Kankakee | Kankakee | Heartland Communications, Inc. | Landline |
| (815) 295- | Cook | Chicago | T-mobile Usa, Inc. | Cell Phone |
| (815) 296- | Will | Romeoville | Metrocall | Landline |
| (815) 297- | Stephenson | Freeport | Verizon North Inc.-il (contel) | Landline |
| (815) 298- | Winnebago | Rockford | Cellco Partnership Dba Veri... | Cell Phone |
| (815) 299- | Winnebago | Rockford | United States Cellular Corp... | Cell Phone |
| (815) 301- | Will | Homer Glen | Broadwing Communications, L... | Landline |
| (815) 302- | Will | Crest Hill | Sprint Spectrum L.p. | Cell Phone |
| (815) 303- | Bureau | Coal Hollow | Illinois Valley Cellular Rs... | Cell Phone |
| (815) 304- | Kankakee | Kankakee | Broadwing Communications, L... | Landline |
| (815) 305- | Grundy | Braceville | Broadwing Communications, L... | Landline |
| (815) 306- | Will | Homer Glen | Broadwing Communications, L... | Landline |
| (815) 307- | McHenry | Bull Valley | Broadwing Communications, L... | Landline |
| (815) 308- | McHenry | Bull Valley | Broadwing Communications, L... | Landline |
| (815) 310- | McHenry | Crystal Lake | Broadwing Communications, L... | Landline |
