| Westcountry Security | 01872 277533 | | Telephone Exchange, Calenick Street, Truro, TR1 2JQ |  Map & Directions |
| Rutherford Associates | 01872 272733 | | Kent House, St. Clement Street, Truro, TR1 1EQ | | Map & Directions |
| Britsec International Ltd | 01209 820599 | | Scorrier Workshops, Scorrier, Redruth, TR16 5AU | | Map & Directions |
| Trelawney Security Systems | 01736 752417 | | 41 Trelissick Road, Hayle, TR27 4HY | | Map & Directions |
| Kathleen Hobbs | 01872 510123 | | Kingsley, Summercourt, Newquay, TR8 5AG | | Map & Directions |
| Alarm Guard | 01736 331335 | | 10 Rosevean Terrace, Penzance, TR18 2AP | | Map & Directions |
| Western Alarms Ltd | 01326 375221 | | 3 Church Lane, Flushing, Falmouth, TR11 5UH | | Map & Directions |
| Cornwall Security Services | 01637 861112 | | 12 Council Houses, Carloggas, St. Mawgan, Newquay, TR8 4EF | | Map & Directions |
| Alarm & Lock Doc | 07980 803526 | | 13 Roskrow Close, Four Lanes, Redruth, TR16 6NG | | Map & Directions |
| Atlantic Security | 01209 712068 | | 13 Atlantic Close, Camborne, TR14 7AP | | Map & Directions |
| Duchy Alarms | 01872 560560 | | Silverwell, Blackwater, Truro, TR4 8JG | | Map & Directions |
| A & J Alarms | 01637 830880 | | 2 Ellenglaze Court, Cubert, Newquay, TR8 5QX | | Map & Directions |
| Frontline Security Services | 01637 873430 | | Po Box 426, Newquay, TR7 2XJ | | Map & Directions |
| Century Alarms | 01872 261934 | | Lape House, Lower Hugus Road, Threemilestone, Truro, TR3 6BD | | Map & Directions |
| Senator Security S W | 01209 219575 | | 7 Cardrew Terrace, Redruth, TR15 1PD | | Map & Directions |
| A S G Security | 01872 222999 | | Unit 34, Threemilestone Industrial Estate, Threemilestone, Truro, TR4 9LD | | Map & Directions |
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