"Sector 3" - Just outside what's left of Dallas, sector mentioned by Lord Dread and Captain Power in episode "The Intruder"
"Sector 9 by 3" - Mentioned by Dread's forces regarding the location of the Power Team in episode "The Ferryman".
"Sector 12" - Location of Haven Commune, sector mentioned by Captian Power in episode "And Study War No More"