| Business | Phone |
| Allegis Communications 5700 6th Ave S, Seattle 98108 | (206) 763-0117 |
| Allnet Communication Svc Inc 300 Elliott Ave W # 330, Seattle 98119 | (206) 286-9033 |
| Anne Marie Chrisafis Svc 10316 11th Ave Nw, Seattle 98177 | (206) 784-6631 |
| Applied Communication 8425 Tillicum Rd Sw 210, Seattle 98136 | (206) 932-7100 |
| Clinton Communications 3863 50th Ave Ne, Seattle 98105 | (206) 524-8986 |
| Coast 2 Coast Technologies 14242 Ambaum Blvd Sw 6, Seattle 98166 | (206) 835-2077 |
| Corporate Communications 2121 5th Ave, Seattle 98121 | (206) 728-1778 |
| Grammar Works 7019 47th Ave Sw 7, Seattle 98136 | (206) 523-4105 |