331 Area Code: Location, Time Zone & Phone Lookup

Area Code 331 Overview

Area Code 331 is one of the most popular area codes in the United States. It covers a large area of the Midwest, including Illinois, Wisconsin, and parts of Iowa and Indiana. This area code is in high demand, and is often used for cell phone numbers and business lines.The 331 area code has a long history, dating back to the late 1950s. It originally served the Chicago area, and was gradually expanded to cover more of the Midwest. Today, it is one of the most heavily populated area codes in the country.

There are several interesting things about Area Code 331. First, it is one of the few area codes that cross state lines. It also has a large number of prefixes, which can make dialing a number in this area code a little confusing. Finally, the 331 area code is often used for business purposes. It is home to some of the country's most important companies, including Google, Sears, and Boeing.

Area Code 331 History

Area code 331 was one of the original area codes established in Illinois in 1947. It originally covered the Chicago area, but has since been split into several different area codes.Area code 331's history is closely tied to that of Chicago. The area code was created in 1947 as one of the original area codes in Illinois. At the time, it covered the entire Chicago area.

However, as Chicago's population grew, the need for more area codes arose. In 1996, area code 630 was created to serve the western suburbs of Chicago. In 2001, area code 773 was created to serve the city of Chicago. And in 2002, area code 219 was created to serve the northern suburbs of Chicago.

Today, area code 331 is used for a small portion of the Chicago metropolitan area. It covers the western suburbs of Chicago, including Aurora, Batavia, and Geneva.