| Business | Phone |
| Mercury Message 1015 31st St Nw, Washington 20007 | (202) 338-8798 |
| Message Studio 2602 Connecticut Ave Nw, Washington 20008 | (202) 234-0400 |
| North Star Office Svc 717 Kennedy St Nw, Washington 20011 | (202) 723-5701 |
| Preferred Office Club 1101 30th St Nw, Washington 20007 | (202) 223-5200 |
| Sincerely Yours Answering Svc 325 Pennsylvania Ave Se, Washington 20003 | (202) 544-1111 |