Area code 507 is the telephone numbering plan code for the southern fifth of Minnesota, including cities such as Rochester, Mankato, Worthington, Fairmont, Albert Lea, Northfield, and Austin. It was the third area code created for use in the state in 1954, following the original 218 and 612. It was created from the southwestern portion of 218 and the southern portion of 612. In the original 1947 plan, area codes containing "0" (zero) as a middle digit were only assigned to states that were entirely covered by a single area code. Area code 507, along with area code 606 in Kentucky and area code 607 in New York, were the first area codes with a middle digit of "0" to be assigned to states that were covered by more than one area code. The region was directly bordered by 612 (to the north) until that area code was divided in the 1990s. The western half of 507 bordered area code 320 starting in 1996, and then later came to border also area code 651 (1998) and area code 952 (2000). The northern border of 507 was modified slightly so that expanding communities in and near the Twin Cities would be more closely linked with that region by telephone. 612 has now shrunk down to include just Minneapolis and a few surrounding suburbs, and no longer borders 507. Relief of 507 will likely be necessary by late 2024, likely as the first overlay in Minnesota, as 507 is expected to exhaust by early 2025. Cities and communities within Adams Adrian Albert Lea Amboy Arlington Austin Blooming Prairie Blue Earth Brownsdale Byron Caledonia Canby Cannon Falls Chatfield Currie Dexter Dodge Center Dovray Dundas Eagle Lake Edgerton Elgin Ellendale Eyota Fairfax Fairmont Faribault Fountain Franklin Fulda Gaylord Gibbon Grand Meadow Hadley Harmony Hayfield Hendricks Hokah Houston Ivanhoe Jackson Janesville Jeffers Kasson Kenyon La Crescent Lake Benton Lake Crystal Lake Wilson Lamberton Lanesboro Le Center Le Roy Le Sueur Lewiston Lewisville Lonsdale Luverne Madelia Madison Lake Mankato Mantorville Mapleton Marshall Medford Montgomery Morgan Morton Mountain Lake New Richland New Ulm Nicollet North Mankato Northfield Oronoco Owatonna Pemberton Pine Island Pipestone Plainview Preston Redwood Falls Rochester Rollingstone Rose Creek Rushford Rushford Village St. Charles St. Clair St. James St. Peter Slayton Sleepy Eye Springfield Spring Grove Spring Valley Stewartville Stockton Taopi Tracy Truman Tyler Vernon Center Walnut Grove Waltham Wanamingo Waseca Waterville Wells West Concord