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History of the 312 Area Code
312 area code is one of the most famous and oldest in the U.S. It was created in 1947 when phone numbers became localized nationwide. In its initial days, it covered all of Chicago and some parts of its neighbors. As the city population skyrocketed and the need for delicate area codes became apparent, 312 was separated to specifically use in Chicago, whereas 708, 773, and 872 were added to its neighbors.
Now, this area code covers Chicago's busiest downtown area, making it an excellent market for any business. Even though other area codes are being added nearby, the popularity of area code 312 is unmatched.
Exploring Business Landscape in the 312 Area Code Region
The area code 312 has been a hub for more prominent companies and businesses due to its open market and huge population. Downtown Chicago has been home to businesses like banks, law firms, tech companies, fast food restaurants, and many more. It has one of the highest GDPs of the country, with $830 billion, making it the largest economy in North America.
McDonald’s, Discover, Morningstar, Enova, and Mondelez International are famous businesses in area code 312.
Getting a 312 phone number helps your business grow locally in Chicago, giving you more credibility. The demand for this phone number is also too high due to its population and business opportunities.

312 Nearby Area Codes
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