| Business | Phone |
| Hcc & Assoc 3 Mill Park Ct, Newark 19713 | (302) 369-6901 |
| Minker Fire Protection Inc 181 Welsh Tract Rd, Newark 19702 | (302) 292-3083 |
| Systems Approach Ltd 3 Mill Park Ct, Newark 19713 | (302) 454-1000 |
| Tva Fire & Life Safety Inc 4 Renee Ct, Newark 19711 | (302) 368-9061 |