Area code 719 is a telephone area code serving the state of Colorado.It covers Colorado Springs, Pueblo, Monument, Leadville, Alamosa, Monte Vista, the San Luis Valley, Cañon City, Trinidad, Rocky Ford, La Junta, Walsenburg and south-eastern Colorado. It split from area code 303 on March 5, 1988.. See also. List of Colorado area codes; External links. NANPA area code map of Colorado