Allen County Sheriff’s Department. If Its county seat is Scottsville. All other departments are dispatched on the "Allen County fire" VHF frequency (154.010 MHz), although all departments have the capability to communicate with dispatchers on the city/county 800 MHz trunked radio system. All other units proceed quietly, 870 Fire Arson Specialized Team (FAST Team), Sta. NOT use or repost raw FCC data. Collin County Public Safety; Dallas P25 / NCTCOG; Frisco P25; Plano, Allen, Wylie, Murphy (PAWM) Codes/Units/Station Lists Collin County Sheriff Unit Numbers. (aka State Route 930) between Executive Blvd.