| Business | Phone |
| Actin Telecom 101 W Grand Ave # 505, Chicago 60610 | (312) 670-1177 |
| Adc Telecommunications 509 N Dearborn St, Chicago 60610 | (312) 595-0270 |
| Afl Telecommunications 939 W Madison St, Chicago 60607 | (312) 829-7185 |
| Alcauter Telecommunication 5312 W Wrightwood Ave, Chicago 60639 | (773) 622-2558 |
| All Areas Access Telecom 333 W 35th St, Chicago 60616 | (773) 548-1390 |
| Allgon Telecom 77 W Huron St, Chicago 60610 | (312) 951-9588 |
| Alpha Communications Inc 4700 W Irving Park Rd, Chicago 60641 | (773) 427-7206 |
| American Communication Svc Inc 907 N Leavitt St 2, Chicago 60622 | (773) 486-1300 |
| American Data & Voice Comms 2248 W Belmont Ave, Chicago 60618 | (312) 455-8800 |
| Arista Communications Group 70 W Madison St, Chicago 60602 | (312) 706-2000 |
| Global Telecom Inc 4751 S Central Ave, Chicago 60638 | (708) 458-8484 |
| Globalcom 333 W Wacker Dr 1500, Chicago 60606 | (312) 895-8818 |
| Globalcom Inc 833 W Chicago Ave, Chicago 60622 | (312) 492-1413 |
| Bennett Group 1030 N State St 21h, Chicago 60610 | (312) 751-8742 |
| Bgh & Co Inc 3630 N Avers Ave, Chicago 60618 | (773) 509-1452 |
| Geckotech Llc 300 N Elizabeth St 510c, Chicago 60607 | (312) 948-2995 |
| G D Telecom 5712 N Saint Louis Ave, Chicago 60659 | (773) 463-7505 |
| Flies Communications 2419 W North Ave, Chicago 60647 | (773) 278-7196 |
| First Communications 333 N Michigan Ave 2800, Chicago 60601 | (312) 456-9595 |
| First Communtions Chicago 60602 | (312) 580-2083 |
| Capi Telecommunications Inc 3024 N Pulaski Rd, Chicago 60641 | (773) 282-4556 |
| Cca Telecommunication 8324 S Calumet Ave, Chicago 60619 | (773) 873-9033 |
| Euro Telecom Plus 5359 W Belmont Ave, Chicago 60641 | (773) 304-0193 |
| Eurotel Chicago 60616 | (312) 326-6800 |
| Enterprise Network Svc 3725 N Western Ave, Chicago 60618 | (773) 583-4009 |
| E Z Phone Home Phone Svc Chicago 60628 | (773) 928-6867 |
| Chicago Power & Communications 17 N State St 1700, Chicago 60602 | (773) 646-6000 |
| Chicago Switch Llc 875 N Michigan Ave 9711, Chicago 60611 | (312) 640-1850 |
| Dreamers Network Inc 5234 S Wolcott Ave, Chicago 60609 | (773) 925-3992 |
| Chung Chiara 455 E Illinois St, Chicago 60611 | (773) 728-6841 |
| Diversified Telecommunications 828 S Wabash Ave # 200, Chicago 60605 | (312) 362-9600 |
| Cimco Communications 33 N Dearborn St # 1025, Chicago 60602 | (312) 759-1880 |
| Dillon Telecommunications Inc 329 W 18th St 309, Chicago 60616 | (312) 421-8316 |
| Clarity Telecom 30 N Michigan Ave, Chicago 60602 | (312) 884-7940 |
| Chicago Athletic Association 12 S Michigan Ave, Chicago 60603 | (312) 236-7500 |
| Dawson's Telecommunications 1900 N Austin Ave 410-, Chicago 60639 | (773) 626-1433 |
| Debit Technologies 5706 W Erie St, Chicago 60644 | (773) 626-7330 |
| D V Technologies Inc 2829 W Cermak Rd, Chicago 60623 | (773) 376-4170 |
| D & S Communications Inc 222 W Ontario St, Chicago 60610 | (312) 266-8409 |
| Cousin Telecom 4014 W 55th St, Chicago 60632 | (773) 767-6061 |
| Cousin Telecom 4167 S Archer Ave, Chicago 60632 | (773) 376-1206 |
| Covad Communications 1620 W 99th St, Chicago 60643 | (773) 779-1803 |
| Covad Communications 311 W Washington St, Chicago 60606 | (312) 782-7689 |
| Covad Communications 3944 N Sawyer Ave, Chicago 60618 | (773) 604-4760 |
| Covad Communications 3949 N Leclaire Ave, Chicago 60641 | (773) 205-2614 |
| Covad Communications 65 W 113th Pl, Chicago 60628 | (773) 785-7479 |
| Covad Communications 8700 W Bryn Mawr Ave, Chicago 60631 | (847) 714-2343 |
| Chicago Telecommunications Inc 3555 S Archer Ave, Chicago 60609 | (773) 342-2155 |