| Business | Phone |
| Adorian & Sons 7212 Righters Mill Rd, Rockville 20855 | (301) 840-0004 |
| All Pro Security Rockville 20852 | (301) 881-5537 |
| Cellular Alert Security 104 Fallsgrove Blvd, Rockville 20850 | (301) 279-5988 |
| Lane Security Systems 14410 Woodcrest Dr, Rockville 20853 | (301) 460-4600 |