Below is a list of VoIP / telecommunication service providers in Illinois:

AA Communications
217-223-1441
4505 Broadway
Quincy IL 62305

Alarm Systems Inc
217-222-2280
Wcu Bldg
Quincy IL 62301

Altra Communication
847-439-2675
1317 Howard St
Elk Grove Village IL 60007-2213

Amer Comm
630-585-1810
636 Westridge Dr
Aurora IL 60504

American Telecom Corporation
773-486-1300
2500 W Chicago Ave
Chicago IL 60622-4515

Antenna Systems
847-584-1000
931 Albion Ave
Schaumburg IL 60193-4550

Bennett Electronic Service Co Inc
815-842-2380
7 Industrial Ct
Pontiac IL 61764-9234

Capitel Communications
217-698-5305
1820 W Jefferson St
Springfield IL 62702-3512

Carr Brian
217-235-3307
121 S 17th St
Mattoon IL 61938

Carter & Sons Electrical
708-396-2264
4042 147th St
Midlothian IL 60445

Catalyst Wireless
815-477-2619
5641 Northwest Hwy
Crystal Lake IL 60014

Charter Communications
618-262-7031
10886 N 1400 Blvd
Mount Carmel IL 62863

Chicago Telecommunications Inc
773-342-2155
Chicago IL 60601

Chicagoland Sales & Service Inc
847-885-1166
Schaumburg IL 60194

Cingular Wireless
217-698-1612
3151 Pleasant Run
Springfield IL 62711-6229

Clear Wave Communications
618-969-9800
1109 N Carbon St
Marion IL 62959-1015

Coil Sales & Mfg Co Inc
217-826-2318
16265 E National Rd
Marshall IL 62441-4287

Commercial Technology Solutions
815-873-8448
4699 Hydraulic Rd
Rockford IL 61109

Commercial Technology Solutions Inc
815-873-8448
Rockford IL 61109

Comm-Net
309-342-2588
1050 Monmouth Blvd
Galesburg IL 61401-5765

Enterprise Telecom Solutions Inc
847-680-1560
17497 W Warren Av
Grayslake IL 60030

Ficek Electric & Communication Systems Inc
815-223-2775
12 Gunia Dr
Lasalle IL 61301

Ficek Electric & Communication Systems Inc
815-223-2775
12 Gunia Dr
La Salle IL 61301

Frank Bill G
309-662-1680
20025 E 1400 N Rd
Bloomington IL 61704

Grafton Technologies Inc
618-639-4841
301 Commerce Blvd
Jerseyville IL 62052

Gt Telecomm
847-947-7470
1040 S Milwaukee Ave
Wheeling IL 60090-6373

Harris Custom Communications
618-996-2448
4223 Saraville Rd
Creal Springs IL 62922-3019

Heartland Telephone Service
618-833-4455
515 E Vienna St # F
Anna IL 62906-2029

ISI Telemanagement Solutions Inc
847-995-0002
1051 N Perimeter
Schaumburg IL 60173

Illinois Bell Communications
217-351-4630
702 Bloomington Rd
Champaign IL 61820-2551

Intersymbol Communications
217-351-1004
2004 Fox Dr
Champaign IL 61820-7336

J & O Communications
618-997-2675
14313 Pittsburg Rd
Marion IL 62959-6979

Kellee Communications Group Inc
773-594-9500
8357 W Summerdale Ave
Chicago IL 60656-1448

MCI
309-747-3275
9786 N 250 East Rd
Gridley IL 61744

Marquis Wireless
217-522-5000
2402 Denver Dr
Springfield IL 62702

Marquis Wireless
309-888-9909
1531 E College Ave
Normal IL 61761-6194

Marquiswireless
217-522-5000
2404 Denver Dr
Springfield IL 62702-1465

Master Telecom Corp Telephone Communication Service
847-245-7401
500 Park Pl Unit 104
Lake Villa IL 60046

Mediacom Communications Inc
815-584-9426
199 Orchard Rd
Dwight IL 60420-1419

Miles Electric & Telecommunications
773-995-6004
113 W 124th St
Chicago IL 60628-7302

Tie National Accounts
630-301-7444
6 W Downer Pl
Aurora IL 60506

Top Dollar Communications
708-344-3541
10330 Roosevelt Rd
Westchester IL 60154

Trivalent Communications
309-828-6100
419 N Main St
Bloomington IL 61701-3915

United Systems Inc
217-228-0315
1008 Jersey St
Quincy IL 62301-4043

Verizon Wireless/Ram Telecom
618-942-6700
921 S Park Ave
Herrin IL 62948-4112

Vinakom Communications
847-908-0228
1365 Wiley Rd Ste 142
Schaumburg IL 60173

Wellsco Inc
309-664-6991
211 N Williamsburg Dr
Bloomington IL 61704-7734