| Business | Phone |
| Global Teleconferencing 1130 S Wabash Ave 105, Chicago 60605 | (312) 447-0035 |
| General Tele-Communications 4750 N Milwaukee Ave, Chicago 60630 | (773) 777-6687 |
| Michigan Avenue Office Svc Inc 333 N Michigan Ave 932, Chicago 60601 | (312) 346-6963 |
| Citizens Conferencing 1349 S Wabash Ave, Chicago 60605 | (312) 794-6700 |
| Priority Ring Ltd 601 W Roosevelt Rd 203, Chicago 60607 | (312) 226-0440 |
| Prono Connections 820 N Orleans St, Chicago 60610 | (312) 649-2687 |
| Rush Answering Svc 840 N Michigan Ave, Chicago 60611 | (312) 943-3314 |
| Rent A Voice 3004 E 79th Pl, Chicago 60617 | (773) 933-0042 |
| Progressive Communications Po Box 201464, Chicago 60620 | (773) 778-5700 |
| Semrow Office Svc 5483 N Northwest Hwy, Chicago 60630 | (773) 775-2424 |
| Rare Inc 5532 N Broadway St, Chicago 60640 | (773) 561-1664 |
| Total Quality Communications 5532 N Broadway St, Chicago 60640 | (773) 828-8300 |
| Genesys Conferencing 1 N Wacker Dr, Chicago 60606 | (312) 924-2100 |
| E Star Communications 222 S Morgan St, Chicago 60607 | (312) 275-0293 |
| Pronto Connections Inc 820 N Orleans St, Chicago 60610 | (312) 649-3600 |
| International Secretarial Exch 500 N Michigan Ave, Chicago 60611 | (312) 321-6935 |
| Marietta's Answering Svc 233 E Ontario St, Chicago 60611 | (312) 787-8582 |
| Ward C Rogers 9204 S Commercial Ave, Chicago 60617 | (773) 288-8111 |
| Local One Telephone Svc 8859 S Greenwood Ave, Chicago 60619 | (773) 933-0012 |
| Informity Network Ltd 731 N Sangamon St, Chicago 60622 | (312) 850-3310 |
| Premiere Conferencing 1330 N Bell Ave, Chicago 60622 | (773) 772-0982 |
| Gen Tel Inc 4750 N Milwaukee Ave, Chicago 60630 | (773) 353-8100 |
| Genral Tele-Communications Inc 4750 N Milwaukee Ave, Chicago 60630 | (773) 725-8100 |
| Southwest Sentry Telephone Svc 4552 S Kedzie Ave, Chicago 60632 | (773) 927-0622 |
| Aaa Svc Listing 5013 W Irving Park Rd, Chicago 60641 | (773) 282-2929 |
| Irene's Answering Svc 924 W 115th St, Chicago 60643 | (773) 264-0648 |
| Premiere Conferencing 1946 W Nelson St, Chicago 60657 | (312) 794-6710 |
| Advanced Answering Service Chicago 27 North Wacker Drive, Chicago 60606 | (773) 770-6027 |