| Bastille Security Services Ltd | 01603 630040 | | Po Box 696, Norwich, NR3 4HP |  Map & Directions |
| Monarch Alarms Ltd | 01603 464434 | | 96a Vauxhall Street, Norwich, NR2 2SD | | Map & Directions |
| Broadland Guarding Services Ltd | 01603 484884 | | Delta House, Vulcan Road North, Norwich, NR6 6AQ | | Map & Directions |
| Overall Security | 01953 789738 | | 37 Bunwell Street, Bunwell, Norwich, NR16 1NA | | Map & Directions |
| Detec Surveillance Ltd | 01603 789287 | | 15 St. Edmunds Close, Norwich, NR6 5ER | | Map & Directions |
| I S L Darden Security Ltd | 01603 263000 | | 18A Bidwell Road , Rackheath Industrial Est/Rackheath , Norwich, NR13 6PT | | Map & Directions |
| Vocalvale Ltd | 01493 732575 | | 2 Yarmouth Road, Hemsby, Great Yarmouth, NR29 4NJ | | Map & Directions |
| Attleborough Security Services | 01953 455829 | | 14 Plasset Drive, Attleborough, NR17 2NU | | Map & Directions |
| Dragon Security Systems | 01603 783958 | | Church Road, Hoveton, Norwich, NR12 8UG | | Map & Directions |
| Initial Electronic Security | 01603 404563 | | 3 Naylor Road, Sweet Briar Road Industrial Estate, Norwich, NR3 2BZ | | Map & Directions |
| Adt Fire & Security | 01603 274300 | | Cringleford Business Centre, 3-4 Intwood Road, Cringleford, Norwich, NR4 6AU | | Map & Directions |
| Dardan Security Ltd | 01603 675800 | | 6 Silver Road, Taverners Square, Norwich, NR3 4SY | | Map & Directions |
| Abacus Security | 01603 301628 | | 9 Barrow Close, Sweet Briar Road Industrial Estate, Norwich, NR3 2AT | | Map & Directions |
| Dardan Security Ltd | 01493 440460 | | Yarmouth Business Park, Suffolk Road, Great Yarmouth, NR31 0ER | | Map & Directions |
| Waveney Security Ltd | 01986 895588 | | 1 Southend Road, Bungay, NR35 1DN | | Map & Directions |
| 6th Sense Ltd | 0800 849 7076 | | 76 Haverscroft Close, Taverham, Norwich, NR8 6LU | | Map & Directions |
| The Alarm Co Ltd | 01603 722920 | | Quartermaster House, Dewing Road, Rackheath Industrial Estate, Rackheath, Norwich, NR13 6PS | | Map & Directions |
| Front Line Security Ltd | 01603 866022 | | 124 Shakespeare Way, Taverham, Norwich, NR8 6TZ | | Map & Directions |
| Aps Security & Protection Ltd | 01692 406227 | | Unit 13, Douglas Bader Close , North Walsham, NR28 0TZ | | Map & Directions |
| Reliant Security Services Ltd | 01603 626228 | | Ground Floor West, 69-75 Thorpe Road, Norwich, NR1 1UA | | Map & Directions |
| Rhino Security | 01603 484999 | | Unit 5 Page Road, Sweet Briar Road Industrial Estate, Norwich, NR3 2BX | | Map & Directions |
| Breckland Trading Co Ltd | 01493 751620 | | South Walsham Road, Acle, Norwich, NR13 3ES | | Map & Directions |
| Extreme Vision Systems Ltd | 01502 514985 | | Southby House, Hollingsworth Road, Lowestoft, NR32 4BW | | Map & Directions |
| Star Security Ltd | 01953 718600 | | Somerset House, School Lane, East Harling, Norwich, NR16 2LU | | Map & Directions |
| Protech Engineering | 01953 453666 | | Unit 5 Ash Farm, Hill Common, Attleborough, NR17 1AF | | Map & Directions |
| Machineguard Ltd | 01502 537719 | | Riverside Business Centre, 1 Riverside Road, Lowestoft, NR33 0TQ | | Map & Directions |
| Manning & Norman | 01502 572957 | | 190 London Road South, Lowestoft, NR33 0BB | | Map & Directions |
| East Coast Security Ltd | 01502 589099 | | Unit 10 Harbour Road, Lowestoft, NR32 3LX | | Map & Directions |
| Vincent Security | 01603 701613 | | 16 Hampden Drive, Thorpe Street Andrew, Norwich, NR7 0UT | | Map & Directions |
| Datadot Technology | 01603 407171 | | 4 Twickenham Road, Norwich, NR6 6NG | | Map & Directions |
| Group Four Securicor | 01603 424715 | | 5 Diamond Road , Norwich, NR6 6AD | | Map & Directions |
| Ark Facilities Ltd | 01603 507050 | | 2d Larkman Lane, Norwich, NR5 8TX | | Map & Directions |
| Rhino Perimeter Security Ltd | 01603 262984 | | 188 Drayton High Road, Drayton, Norwich, NR8 6BA | | Map & Directions |
| Anglia Electrical & Security Ltd | 01502 500923 | | Unit 4 Ness Point House, Waveney Road, Waveney Market North, Lowestoft, NR32 1DB | | Map & Directions |
| Boing Ltd | 01953 601911 | | Bridge Industrial Estate, Acorn Court, Wymondham, NR18 9AL | | Map & Directions |
| Sonata Security | 01953 601666 | | Unit 1, Philip Ford Way, Oaktree, Silfield, Wymondham, NR18 9AQ | | Map & Directions |
| Gardiner Security Ltd | 01603 789569 | | 124 Drayton High Road, Hellesdon Park Road, Norwich, NR6 5DR | | Map & Directions |
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