The area code 224 is located in Arlington Heights, Illinois.
Area code 224 serves Arlington Heights and the broader North and Northwest suburbs of Chicago in northeastern Illinois. It is an overlay of 847, created to meet demand for new phone numbers across northern Cook and Lake counties. Arlington Heights, a major suburb northwest of Chicago, sits within this calling area and uses 10-digit dialing along with nearby communities. The region blends busy downtowns, quiet neighborhoods, and key business corridors, making 224 a common area code for both homes and companies.
Cities and communities commonly covered by 224/847 include:
Introduced as an overlay in 2002, area code 224 does not change boundaries; it simply adds more numbers in the same places that use 847. Because of this overlay, 10-digit dialing is standard for local calls. The 224/847 region features notable landmarks, such as the former Arlington International Racecourse in Arlington Heights, Six Flags Great America in Gurnee, Naval Station Great Lakes in North Chicago, and the Chicago Botanic Garden in Glencoe. Businesses and residents across these suburbs often have interchangeable 224 or 847 phone numbers tied to the same service area.
“224 serves as an overlay to 847 in northeast Illinois (effective 2002).” — North American Numbering Plan Administrator (NANPA)
Helpful to know: 224 numbers follow Central Time (CT), and new lines in Arlington Heights may receive either 224 or 847 depending on availability. This makes area code 224 a key part of daily life and commerce throughout the Chicago metro’s northern suburbs.