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

Ace Link Telecommunications Inc
507-725-8100
310 W Main St
Caledonia WI 53108

Advanced Communications
715-479-4242
872 US Highway 45 S
Eagle River WI 54521

Airstream Communications
608-829-2667
6602 Normandy Ln
Madison WI 53719-1081

Amherst Telephone Company
715-824-5529
120 PO Box
Amherst WI 54406

.Cabling Concepts Of Wisconsin
608-423-4479
223 US Highway 18
Cambridge WI 53523

Cellular One
715-356-4448
8600 US Highway 51 N
Minocqua WI 54548

Cochrane Co-Op Telephone Co
608-248-2323
103 W 5th St
Cochrane WI 54622-7139

Cochrane Cooperative Telephone Company
608-248-2323
103 W 5th St
Cochrane WI 54622-7139

Communication Consultants Intl
800-952-9932
3043 N 76th St
Milwaukee WI 53222

Communication Systems International Inc
715-232-8500
103 N Bridge St
Chippewa Falls WI 54729-2478

Hughes Communications Inc
920-648-5842
109 N Main St
Lake Mills WI 53551

Indianhead Telephone Company
715-353-2434
Weyerhaeuser WI 54895

Kish Telecom
608-796-2222
722 Rose St
La Crosse WI 54603-2667

MHTC Net
608-930-9985
305 N Iowa St
Dodgeville WI 53533

Manawa Telephone Co Inc
920-596-2535
131 2nd St
Manawa WI 54949

Metrocall
262-338-7969
1631 N Main St
West Bend WI 53090

Mhtc
608-930-9985
305 N Iowa St
Dodgeville WI 53533-1355

Mitel Networks
262-347-0610
N19 W24400 Riverwood Dr
Pewaukee WI 53072

Mount Horeb Telephone Company
608-437-5551
200 E Main St
Mount Horeb WI 53572-2104

Mt Horeb Telephone Company
608-437-5541
200 E Main St
Mount Horeb WI 53572-2104

Technology Management
715-453-7449
1926 Sunset Dr
Tomahawk WI 54487

Telephone Associates
800-777-7248
329 Grand Ave
Superior MN 54880

Telmon Inc
715-843-0716
115 Forest St
Wausau WI 54403-5504

Telmon Inc
715-843-0716
Wausau WI 54401

Timewarner Telecom
262-373-1611
3235 Intertech Dr
Brookfield WI 53045

Timewarner Telecom
262-373-1611
3235 Intertech Dr Ste 600
Brookfield WI 53045-5154

Winstar Telecommunications
262-827-8400
13255 W Bluemound Rd
Brookfield WI 53005

Wisconsin Telecommunications Relay System Wtrs
608-827-0401
Middleton WI 53562