| Business | Phone |
| Mill City Locksmith 802 Lakeview Ave, Lowell 1850 | (978) 458-5557 |
| Modern Key Shop 380 Bridge St, Lowell 1850 | (978) 446-0100 |
| Chelmsford Lock & Key Inc 101 Tanner St, Lowell 1852 | (978) 454-4240 |
| Roberts Lock 330 Christian St, Lowell 1850 | (978) 453-5600 |
| Post Office Locksmith Shop 130 Gorham St, Lowell 1852 | (978) 453-6616 |
| Day Emergency A 24 Hour 1278 Gorham St, Lowell 1852 | (978) 826-2446 |
| Lowell Lock & Key 1599 Middlesex St, Lowell 1851 | (978) 459-7020 |
| Hank & Sons Locksmith Svc 463 Merrimack St, Lowell 1854 | (978) 452-2732 |
| Hour 7a Day Emerg Locksmith 0 37 Elliott St, Lowell 1852 | (978) 826-2865 |