Area code 959 is located in northeastern Connecticut, and it has been in service since August 30, 2014. The area code overlays area codes 860 and 959. Connecticut Counties within Area Code 959: Hartford, New London, Litchfield, Tolland, Middlesex, Windham. Connecticut Major Cities within Area Code 959: Hartford, New Britain, West Hartford, Bristol, East Hartford, Middletown, Norwich, Torrington, Manchester, Newington, New London, Wethersfield, Willimantic, Storrs, Windsor Locks, Groton, Oakville, Conning Towers Nautilus Park, Thompsonville, Kensington, Winsted, Southwood…

Area Code 860 is a Connecticut area code. It has been in service since August 28, 1995. The area code covers northeastern Connecticut, including the cities of New London, Norwich, and Hartford. The 860 area code was created as an overlay to Area Code 959 when the former’s supply of phone numbers ran low. The…

Area code 203 is located in southeastern Connecticut and has been in service since December 12, 2009. It is part of the overlay complex 203/475. Connecticut Counties within Area Code 475: Fairfield, New Haven, Litchfield. Connecticut Major Cities within Area Code 475: Bridgeport, New Haven, Stamford, Bridgeport, New Haven, Stamford, Waterbury, Norwalk, Danbury, Meriden, West Haven, Stratford, Milford, Shelton, Trumbull, Naugatuck, East Haven, Westport, North Haven, Darien, Ansonia, Wallingford…

The area code 203 is located in southwestern Connecticut and has been in service since January 01, 1947. The area code is an overlay complex 203/475. Connecticut Counties within Area Code 203: New Haven, Fairfield and Litchfield. Connecticut Major Cities within Area Code 203: Bridgeport, New Haven, Stamford, Waterbury, Norwalk, Danbury, Meriden, West Haven, Stratford, Milford, Shelton, Trumbull, Naugatuck, East Haven, Westport, North Haven, Darien, Ansonia, Wallingford Center, Orange, Greenwich, Derby, Bethel, Riverside, Ridgefield, Cos Cob, Old Greenwich, Branford Center, Cheshire…

Area code 872 serves Chicago and has been in service since November 07, 2009. The area code covers the entire city of Chicago, which is the third-most populous city in the United States. It is located in Cook County, Illinois and is an economically important region within the country. Illinois Counties within Area Code 872:…

Area code 847 is a telephone area code in northeastern Illinois, serving the northern portion of the Chicago area. It has been in service since January 20, 1996, and has a single overlay (224) that serves the same area. Illinois Counties within Area Code 847: Cook, Lake, Kane, McHenry Illinois Major Cities within Area Code…

The 815 area code serves northern Illinois except for the Chicago metro area. The 815 area code has been in service since January 01, 1947. Illinois Counties within Area Code 815: Boone, Bureau, Carroll, DeKalb, Ford, Grundy, Henry, Iroquois, Jo Daviess, Kane, Kankakee, Kendall, La Salle, Lee, Livingston, Marshall, McHenry, McLean, Ogle, Putnam, Stephenson, Whiteside…

Area code 779 is for northern Illinois, except for the Chicago metro area. It was put into service on March 17, 2007. This is an overlay code that is part of the complex 815/779 combination. Illinois Counties within Area Code 779: Boone, Bureau, Carroll, DeKalb, Ford, Grundy, Henry, Iroquois, Jo Daviess, Kane, Kankakee, Kendall, La…

Area code 970 is located in Colorado, and covers Denver, Westminster, and Boulder. It was put into service on June 17, 2022. 970 is an overlay code: it overlays area code 303 and is part of the overlay complex 303/720/983. Colorado Counties within Area Code 983: Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver, Douglas, Eagle,…

Colorado Counties within Area Code 970: Larimer, Weld, Mesa, Garfield, Eagle, La Plata, Montrose, Delta, Morgan, Summit, Montezuma, Routt, Logan, Pitkin, Gunnison, Grand, Moffat, Archuleta, Yuma, San Miguel, Rio Blanco, Washington, Phillips, Ouray, Sedgwick, Dolores, Jackson, Kit Carson, Hinsdale, San Juan, Clear Creek. Colorado Major Cities within Area Code 970: Fort Collins, Greeley, Loveland, Grand Junction, Clifton, Montrose, Windsor, Evans, Durango, Sterling, Fruita, Steamboat Springs, Fort Morgan, Edwards, Johnstown, Glenwood Springs, Craig, Rifle, Delta, Redlands, Cortez, Fruitvale, Orchard…