Area codes 919 and 984

The 303 area code was introduced in 1947 as one of the first area codes in the United States. At that time, it covered the entire state of Colorado. For over 40 years, 303 was the only area code people used across cities and small towns alike. But as the population grew, Colorado had to make changes to keep up with the demand for new phone numbers. In 1988, the state added the 719 area code to cover southern and eastern Colorado. A few years later in 1995, the 970 area code was introduced for th

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