| Company Name | Street | Suite | City | St | Zip | Phone | Fax | Website |
| Monadnock Security Systems Inc | PO Box 256 | New Ipswich | NH | 03071 | (603) 878-0600 | (603) 878-0611 | www.monadnocksecurity.com | |
| Fire Alarm & Safety Technologies Inc | PO Box 849 | Pelham | NH | 03076 | (603) 635-8429 | (603) 635-3282 | ||
| International Signal | 40 Lowell Rd | Ste 2 | Salem | NH | 03079 | (603) 893-8803 | (603) 894-4455 | |
| Centra-Larm Monitoring | 994 Candia Rd | Manchester | NH | 03109 | (800) 639-4068 | (603) 668-1117 | www.centra-larm.com | |
| Mango Security Systems Inc | 43 Monroe St | Franklin | NH | 03235 | (603) 934-4723 | www.mangosecurity.com | ||
| Total Security Inc | 689 Gilford Ave | Gilford | NH | 03249 | (603) 524-2833 | (603) 524-2109 | ||
| A Plus Alarms LLC | 29 Foundry Ave | Unit F | Meredith | NH | 03253 | (603) 279-3195 | (603) 279-7272 | www.aplusalarmsnh.com |
| Northmark Security & Communications | PO Box 1109 | New London | NH | 03257 | (603) 763-4982 | www.northmark-pbx.com | ||
| Catamount Electric & Alarm LLC | 356 Catamount Rd | Pittsfield | NH | 03263 | (603) 435-8980 | (603) 435-8911 | ||
| Capitol Alarm Systems Inc | 37 Washington St | Penacook | NH | 03303 | (603) 753-4044 | (603) 753-4144 | www.capitolalarms.com | |
| Amer Electric Inc | PO Box 1090 | Keene | NH | 03431 | (603) 357-8553 | (603) 352-6884 | ||
| Tasco Security Inc | PO Box 850 | Lebanon | NH | 03766 | (603) 448-2245 | (603) 448-2469 | www.tascosecurity.com | |
| SecuriCom Systems Inc | PO Box 39 | 3 Main St | Atkinson | NH | 03811 | (603) 362-4714 | (603) 362-4071 | |
| DM Burns Security Inc | 100 Central Ave | Dover | NH | 03820 | (603) 742-3212 | (603) 743-3212 | ||
| Lakeside Security Systems | 287 W Bay Rd | Freedom | NH | 03836 | (603) 539-5600 | (603) 539-2712 | ||
| Rochester Security Systems LLC | 169 Milton Rd | Rochester | NH | 03868 | (603) 332-5092 |