It is believed that southern blackmouth dogs originated in Alabama, although southern blackmouth curses are also found in Florida and Tennessee. Howard’s Southern Black Mouth Curs line was the first Black Mouth Curs line to be registered with a legitimate and well-documented outside source. They were registered at a courthouse near Howardtown, Alabama, about 40 miles (64 km) north of Mobile and nearby Tibby in the early 1940s.