Northern Illinois is served by area code 815, introduced in 1947 and now overlaid by 779 to meet growing demand. It includes cities such as Rockford, DeKalb, and Joliet, known for their industrial past and prairie charm. The region bridges Chicagoland sprawl with farmlands and river valleys steeped in midwestern character. 815 stands as a snapshot of Illinois outside the urban core.
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Select Virtual Numbers by Area Code 815
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Cities of Area Code 815
Description of the cities in area code 815
About Belvidere
Belvidere is a vibrant city located in the IL area, home to approximately 25,132 residents.
Geographically, it lies at a latitude of 42.26391 and a longitude of -88.84427 , with an elevation of 238 meters above sea level.
The city spans from 42.281161 N to 42.231405 S and stretches east to -88.802218 and west to -88.934795.
Learn more about Belvidere on Wikipedia
About Crystal Lake
Crystal Lake is a vibrant city located in the IL area, home to approximately 40,448 residents.
Geographically, it lies at a latitude of 42.24113 and a longitude of -88.3162 , with an elevation of 279 meters above sea level.
The city spans from 42.276973 N to 42.190063 S and stretches east to -88.27181 and west to -88.423301.
Learn more about Crystal Lake on Wikipedia
About DeKalb
DeKalb is a vibrant city located in the IL area, home to approximately 43,211 residents.
Geographically, it lies at a latitude of 41.92947 and a longitude of -88.75036 , with an elevation of 268 meters above sea level.
The city spans from 41.97176 N to 41.883337 S and stretches east to -88.693666 and west to -88.797425.
Learn more about DeKalb on Wikipedia
About Freeport
Freeport is a vibrant city located in the IL area, home to approximately 50,000 residents.
Geographically, it lies at a latitude of 42.35183 and a longitude of -89.66225
The city spans from 42.505818 N to 42.196651 S and stretches east to -89.396192 and west to -89.926509.
About Joliet
Joliet is a vibrant city located in the IL area, home to approximately 147,861 residents.
Geographically, it lies at a latitude of 41.52519 and a longitude of -88.0834 , with an elevation of 165 meters above sea level.
The city spans from 41.594791 N to 41.431379 S and stretches east to -87.990778 and west to -88.361802.
Learn more about Joliet on Wikipedia
About Kankakee
Kankakee is a vibrant city located in the IL area, home to approximately 26,676 residents.
Geographically, it lies at a latitude of 41.12003 and a longitude of -87.86115 , with an elevation of 200 meters above sea level.
The city spans from 41.145939 N to 41.046996 S and stretches east to -87.821177 and west to -87.920977.
Learn more about Kankakee on Wikipedia
About Loves Park
Loves Park is a vibrant city located in the IL area, home to approximately 23,455 residents.
Geographically, it lies at a latitude of 42.32002 and a longitude of -89.05816 , with an elevation of 222 meters above sea level.
The city spans from 42.37018 N to 42.293905 S and stretches east to -88.91999 and west to -89.069963.
Learn more about Loves Park on Wikipedia
About Machesney Park
Machesney Park is a vibrant city located in the IL area, home to approximately 22,927 residents.
Geographically, it lies at a latitude of 42.34724 and a longitude of -89.039 , with an elevation of 226 meters above sea level.
The city spans from 42.401777 N to 42.325036 S and stretches east to -88.951399 and west to -89.073953.
Learn more about Machesney Park on Wikipedia
About McHenry
McHenry is a vibrant city located in the IL area, home to approximately 40,448 residents.
Geographically, it lies at a latitude of 42.24113 and a longitude of -88.3162 , with an elevation of 279 meters above sea level.
The city spans from 42.276973 N to 42.190063 S and stretches east to -88.27181 and west to -88.423301.
Learn more about McHenry on Wikipedia
About Rockford
Rockford is a vibrant city located in the IL area, home to approximately 148,278 residents.
Geographically, it lies at a latitude of 42.27113 and a longitude of -89.094 , with an elevation of 218 meters above sea level.
The city spans from 42.33864 N to 42.143238 S and stretches east to -88.940678 and west to -89.195274.
Learn more about Rockford on Wikipedia
About Romeoville
Romeoville is a vibrant city located in the IL area, home to approximately 39,719 residents.
Geographically, it lies at a latitude of 41.64753 and a longitude of -88.08951 , with an elevation of 189 meters above sea level.
The city spans from 41.679888 N to 41.59268 S and stretches east to -88.02876 and west to -88.163103.
Learn more about Romeoville on Wikipedia
About Woodstock
Woodstock is a vibrant city located in the IL area, home to approximately 25,189 residents.
Geographically, it lies at a latitude of 42.31474 and a longitude of -88.4487 , with an elevation of 288 meters above sea level.
The city spans from 42.358239 N to 42.269758 S and stretches east to -88.38497 and west to -88.491777.
Learn more about Woodstock on Wikipedia
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