The 224 area code covers the northern suburbs of Chicago rather than the downtown core, reaching most of Lake County, the northern portions of Cook and Kane counties, and a small section of McHenry County, with named communities including Evanston, Skokie, Wilmette, Arlington Heights, Schaumburg, Elgin, Waukegan, Gurnee, Highland Park, Lake Forest, Des Plaines and Buffalo Grove, all within the Central Time Zone. It is not a geographic split but an overlay: area code 847 launched in 1996 after splitting from the older 708 code, and when mobile phones, fax lines and pagers exhausted 847's supply within a few years, regulators introduced 224 as an all-services overlay in January 2002 covering the exact same footprint, meaning a 224 number reveals nothing about which specific suburb a person lives in since 847 and 224 are assigned interchangeably. Because of the overlay, the region requires mandatory 10-digit dialing for every call, even between neighbors. The article states 224 is not flagged as an especially high-risk code but still appears in a normal share of scam reports, including callers posing as government agencies claiming a compromised Social Security number, fake decades-old debt collection, bogus Amazon shipping-notice texts with callback numbers, and IRS or tech-support impersonation, almost always relying on caller ID spoofing rather than actual Illinois origin. For business use, cloud platforms can provision a 224 number within minutes without a physical Lake, Cook or Kane County office, supporting call recording, auto-attendants, SMS and multiple simultaneous area codes as a company expands into new suburbs or states.