| 911 Emergency | | 911 |
| Adelphia Cable | | 301-662-6822 |
| Allegheny Power | | 800-255-3443 |
| Animal Control | | 301-694-1546 |
| Appraiser ~ Briggs & Associates | | 301-447-3110 |
| Appraiser ~ Six & Associates | | 301-694-5626 |
| Assessments Office | | 301-815-5350 |
| BMC Computer Products, Accounting | | 301-698-0795 |
| Board of Elections | | 301-600-1058 |
| Bulk Trash Line | | 301-228-2855 |
| Carpet Cleaning ~ Mitex of Maryland | | 301-473-8364 |
| Carpet, Upholsery, and Mattress Cleaning Services | | 301-473-8364 |
| Circuit Court | | 301-600-1976 |
| City Of Frederick | | 301-600-1440 |
| Comcast Cable Television | | 888-683-1000 |
| County Commissioners | | 301-600-1100 |
| Courthouse | | 301-600-2570 |
| District Court | | 301-600-2000 |
| Domestic Violence Hotline | | 301-662-8800 |
| Fire & Rescue Services | | 301-600-1536 |
| Fire Marshall | | 301-600-1479 |
| Frederick City Water & Sewer | | 301-694-1421 |
| Frederick Community College | | 301-846-2400 |
| Frederick County Board of Education | | 301-644-5000 |
| Frederick County Office of Permits | | 301-631-2313 |
| Frederick County Public Library | | 301-694-1630 |
| Frederick County Sheriff | | 301-694-1046 |
| Frederick County Waste Department | | 301-694-1848 |
| Frederick County Water & Sewer | | 301-694-1126 |
| Frederick Gas | | 301-662-2151 |
| Frederick Memorial Hospital | | 240-566-3300 |
| Frederick Police Department | | 301-600-2100 |
| Home Inspector ~ Home Tech, Jimmy Morrison | | 888-499-2900 |
| House Cleaning Services | | 301-874-5472 |
| Housing | | 301-600-1061 |
| Jobline | | 301-631-2315 |
| K&K Automotive | | 301-663-5258 |
| Lender ~ Countrywide Home Mortgage | | 301-846-2307 |
| Lender ~ Homebuilders Mortgage | | 800-434-0011 |
| Lender ~ M Lend "Home Loans Made Fast & Easy" | | 240-674-3553 |
| Lender ~ PSP Financial ~ Bracey Simmons | | 301-698-0828 |
| Locksmith ~ Gene's Lock Service | | 301-662-1280 |
| Maryland Motor Vehicle Administration | | 800-950-1682 |
| Maryland State Police | | 301-644-4151 |
| Movers ~ Ramar Moving Systems | | 800-925-6683 |
| Radon Testing ~ Enviro Tech | | 800-434-7360 |
| Radon Testing ~ Home Tech, Jimmy Morrison | | 888-499-2900 |
| Radon Testing ~ Northwest Termite & Pest | | 800-884-5275 |
| State Highway | | 301-624-8100 |
| Termite Inspector ~ Enviro Tech | | 800-434-7360 |
| Termite Inspector ~ Northwest Termite & Pest | | 800-884-5275 |
| Thurmont Muncipal Light & Water Co. | | 301-271-7313 |
| Title/Settlement Co. ~ Tri | State Signature Settlements | | 301-797-0600 |
| Tourism | | 301-228-2888 |
| TransIT Service of Frederick County | | 301-600-2065 |
| Verizon | | 301-954-6260 |
| Well & Septic Testing ~ Enviro Tech | | 800-434-7360 |
| Well & Septic Testing ~ Northwest Termite & Pest | | 800-884-5275 |
