Establish a local presence by purchasing a phone number in area code 815. Phone numbers in area code 815 are associated with the state of Illinois. There are currently at least 12 U.S. cities and 210 U.S. ZIP Codes associated with this telephone area code. In addition, there are at least 800 NXX's (the three-digit code that makes up digits 4-6 of a standard 10-digit U.S. phone number) available for use along with area code 815.
Phone numbers in area code 815 are associated with the state of Illinois.
The 815 area code currently has at least 12 cities in Illinois associated with it: Belvidere, IL; Crystal Lake, IL; DeKalb, IL; Freeport, IL; Joliet, IL; Kankakee, IL; Loves Park, IL; Machesney Park, IL; McHenry, IL; Rockford, IL; Romeoville, IL; and Woodstock, IL.
There are at least 210 U.S. ZIP codes associated with the area code 815 at this time (view all here).
The ZIP Code 60435 is the ZIP Code most frequently connected to the 815 area code. The 60435 ZIP Code is primarily associated with Will County in the state of Illinois.
There are 26 counties associated with the 815 area code: La Salle County; Winnebago County; Will County; McHenry County; Cook County; Whiteside County; Kankakee County; DeKalb County; Carroll County; Stephenson County; Ogle County; Grundy County; Lake County; Lee County; Ford County; Iroquois County; Jo Daviess County; Boone County; Bureau County; Putnam County; Livingston County; Marshall County; Kendall County; Kane County; McLean County; Henry County.
An NXX, which is also known as the a "central office code" or an "exchange", is the three-digit sequence that comprises digits 4-6 of a standard 10-digit U.S. phone number. The NXX is the second main part of a phone number that comes directly after the area code, e.g. (815)-213-xxxx.
Detailed information about area code 815 phone numbers. Establish a Illinois presence with a 815 number.