| Business | Phone |
| King Communications Inc Schaumburg 60195 | (847) 776-7777 |
| Imagistics International Inc 2330 Hammond Dr, Schaumburg 60173 | (847) 303-7150 |
| Teleprime Inc 1305 Wiley Rd 102, Schaumburg 60173 | (847) 252-7100 |
| Videoconferencing Plus 1051 E Woodfield Rd, Schaumburg 60173 | (847) 413-3934 |
| Sbc Xameritech 2000 W Sbc Center Dr, Schaumburg 60192 | (847) 248-2000 |