1. South Zone: Thiruvananthapuram, Kollam and Pathanamthitta Districts            Head Quarters Thiruvananthapuram.
2. South Central Zone: Ernakulam, Kottayam, Idukki and Alappuzha  Districts     Head Quarters Ernakulam    
3. North Central zone: Trichur, Palakkad and Malappuram Districts.                   Head  Quarters Thrissur.
4. North zone: Kozhikode, Kannur Wayanad and Kasargod Districts.                 Head Quarters Kozhikode.