| Business | Phone |
| Berenson Productions Inc 1616 H St Nw, Washington 20006 | (202) 546-2020 |
| Business Communications Group 4833 Western Ave Nw, Washington 20016 | (202) 686-6267 |
| Communications Network Arch 2440 Virginia Ave Nw, Washington 20037 | (202) 775-8000 |
| Ellis Enterprises Llc 204 9th St Ne, Washington 20002 | (202) 547-5544 |
| Robert H Fleming 1652 Irving St Nw, Washington 20010 | (202) 797-2388 |
| Flint Electronics 3701 Connecticut Ave Nw, Washington 20008 | (202) 537-0480 |
| General Electric Co 1299 Pennsylvania Ave Nw #1100, Washington 20004 | (202) 637-4000 |
| Home Front Communications 1620 I St Nw # 520, Washington 20006 | (202) 544-8400 |
| Irwin Communications Inc 1333 H St Nw # 11w, Washington 20005 | (202) 223-1016 |
| Itt Industries 901 D St Sw # 222, Washington 20024 | (202) 314-5900 |
| Jansky-Barmat Tlcmmnctns 1120 19th St Nw # 333, Washington 20036 | (202) 467-6400 |
| On The Potomac Production Inc 1221 11th St Nw, Washington 20001 | (202) 898-0899 |
| Paulist Media Works Inc 3015 4th St Ne, Washington 20017 | (202) 269-6064 |
| Rice Williams Assoc 2121 K St Nw # 800, Washington 20037 | (202) 737-2400 |
| Sutton Group 4590 Macarthur Blvd Nw # 200, Washington 20007 | (202) 342-1333 |
| Swisscom Na 2001 L St Nw # 750, Washington 20036 | (202) 785-1145 |
| Teleconsult International Svc 3333 K St Nw # 101, Washington 20007 | (202) 466-3250 |
| Allied Communications Group 4201 Connecticut Ave Nw # 402, Washington 20008 | (202) 537-1500 |