| Business | Phone |
| Abilities Network Inc 174 Thomas Johnson Dr, Frederick 21702 | (301) 293-6419 |
| Aircraft Owners & Pilots Assn 421 Aviation Way, Frederick 21701 | (301) 695-2000 |
| Alzheimer's Association 108 Byte Dr # 103, Frederick 21702 | (301) 696-0315 |
| American Ferret Assn Inc Frederick 21701 | (301) 846-4627 |
| American Genetic Association 4201 Baker Valley Rd, Frederick 21704 | (301) 695-9292 |
| American Society-Law Enfrcmnt 7611 Willow Rd # B, Frederick 21702 | (301) 668-9466 |
| Arthritis Foundation 22 S Market St, Frederick 21701 | (301) 663-0303 |
| Bar Association Of Frederick 22 S Market St, Frederick 21701 | (301) 663-1139 |
| Carrollton Manor Land Trust 425 S Jefferson St, Frederick 21701 | (301) 682-3276 |
| Civil Air Patrol 8400 Bowmans Farm Rd # A, Frederick 21701 | (301) 662-5400 |
| Diesel Technology Forum 5291 Corporate Dr # 102, Frederick 21703 | (301) 668-7230 |
| Eastern National Livestock Inc 3810 Ballenger Creek Pike, Frederick 21703 | (301) 698-0271 |
| Epilepsy Association 5300 Westview Dr, Frederick 21703 | (301) 695-2781 |
| Framers Cooperative Assn Inc 820 E South St, Frederick 21701 | (301) 694-0136 |
| Frederick Association Of Schl 1 Wormans Mill Ct # 15, Frederick 21701 | (301) 620-9217 |
| Frederick Chamber Of Commerce 43 S Market St # A, Frederick 21701 | (301) 662-4164 |
| Frederick County Builders Assn 186 Thomas Johnson Dr # 204, Frederick 21702 | (301) 663-3599 |
| Friends Of Catholic Education 53 E Patrick St # 3rd-Fl, Frederick 21701 | (301) 846-7804 |
| Jeffersonian Patriotic Club 300 E 4th St, Frederick 21701 | (301) 663-9650 |
| Maryland & Virginia Milk 7432 Grove Rd, Frederick 21704 | (301) 663-6552 |
| Maryland Sheriff's Youth Ranch 7902 Fingerboard Rd, Frederick 21704 | (301) 831-8898 |
| Maryland Sheriffs 7902 Fingerboard Rd, Frederick 21704 | (240) 629-3330 |
| Mid-Atlantic Glass Assoc Frederick 21704 | (301) 831-8338 |
| Mid-Atlantic Soaring Assn 8171 Gas House Pike, Frederick 21701 | (301) 846-4164 |
| National Auto Auction Assn 5320 Spectrum Dr # D, Frederick 21703 | (301) 696-0400 |
| Shared Vision-Public Art 7192 Meadowbrooke Dr, Frederick 21702 | (301) 698-2647 |
| Society-Applied Spectroscopy 201 Broadway St # B, Frederick 21701 | (301) 694-8122 |
| Toxicology Pathology Assn 220 N Market St, Frederick 21701 | (301) 668-8777 |
| United Cerebral Palsy 5736 Industry Ln, Frederick 21704 | (301) 663-8700 |
| United States Ultralight Assn 34 S Market St, Frederick 21701 | (301) 695-9100 |
| Villages Of Urbana Comm Assn 9023 Harris St, Frederick 21704 | (301) 831-4810 |
| Washington County Human Dev 916 N East St, Frederick 21701 | (301) 293-6055 |
| Wormans Mill Comm Conservancy 2470 Stoney Creek Rd, Frederick 21701 | (301) 696-9476 |