| Business | Phone |
| Abe Alarm Center 1014 N Quebec St, Allentown 18109 | (484) 664-7304 |
| American Security Corp 435 E Emmaus Ave, Allentown 18103 | (610) 433-0700 |
| B & K Security Systems 320 N Franklin St, Allentown 18102 | (610) 791-4211 |
| Confidential Investigations 455 W Linden St, Allentown 18102 | (610) 821-9112 |
| Contemporary Security Systems 1827 W Hamilton St, Allentown 18104 | (610) 437-0770 |
| Knight Protective Systems Inc Allentown 18102 | (610) 432-9345 |
| Monks Security Systems 302 Chapel Ave, Allentown 18103 | (610) 366-0198 |
| Morgan & Morgan 918 E Tilghman St, Allentown 18109 | (610) 433-1925 |
| Nightwatch Inc 1605 N Cedar Crest Blvd, Allentown 18104 | (610) 439-6677 |
| Tri-State Alarm Co Allentown 18102 | (610) 433-7955 |
| Wisch Security Systems Inc 28 N Jerome St, Allentown 18109 | (610) 437-1966 |
| Star Security Systems Allentown 18102 | (610) 437-0300 |
| Protect Alarms 1932 S 4th St, Allentown 18103 | (610) 797-7000 |
| Secure One Allentown 18102 | (610) 433-5685 |
| Security Service Co 6034 Hamilton Blvd, Allentown 18106 | (610) 373-4777 |