| Business | Phone |
| Customer Contact Inc 2600 Boyce Plaza Rd # 210, Pittsburgh 15241 | (412) 431-7020 |
| Dial America Marketing Inc 2 Parkway Ctr # 200, Pittsburgh 15220 | (412) 921-7836 |
| Dial America Marketing Inc 777 Penn Center Blvd # 500 # 7, Pittsburgh 15235 | (412) 816-1100 |
| Dial America Marketing Inc 875 Greentree Rd, Pittsburgh 15220 | (412) 921-7836 |
| Direct Advantage Marketing 5601 Hobart St, Pittsburgh 15217 | (412) 521-2500 |
| Marshall Marketing & Comm 2660 Boyce Plaza Rd, Pittsburgh 15241 | (412) 914-0970 |
| One Call Systems 115 Evergreen Heights Dr, Pittsburgh 15229 | (412) 415-5000 |
| P T Marketing Group 650 Smithfield St # 1080, Pittsburgh 15222 | (412) 471-8995 |
| Prospecting Center 305 34th St, Pittsburgh 15201 | (412) 621-7095 |
| Public Interest Communication 5001 Baum Blvd # 600, Pittsburgh 15213 | (412) 622-7370 |