| Adams-Columbia Electric Cooperative | NPACEW | AT&T Non-Participating Code for Adams-Columbia Electric Cooperative
Adams, Columbia, Dane, Dodge, Green Lake, Jefferson, Marquette, Portage, Sauk, Waupaca, Waushara, and Wood | Wisconsin | Adams, Columbia, Dane, Dodge, Green Lake, Jefferson, Marquette, Portage, Sauk, Waupaca, Waushara, Wood |
| Algoma Utilities | ALGOMA | Kewaunee County - City of Algoma and the surrounding areas within a one mile radius of the city limits | Wisconsin | Kewaunee |
| Asplundh Tree Expert, LLC (Alliant Energy) | ASPWPL | Contractor code for Asplundh Tree Expert to be used with Alliant Energy | Wisconsin | Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood |
| AT&T Wisconsin | ATTWI | All of Wisconsin | Wisconsin | Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood |
| ATC American Transmission Company LLC | ATCWPL | All of Wisconsin | Wisconsin | Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood |
| CCI Systems, Inc. d.b.a. Astrea | ASTRWI | Ashland, Barron, Chippewa, Clark, Dane, Dodge, Douglas, Eau Claire, Florence, Forest, Grant, Iowa, Iron, Juneau, LaFayette, Langlade, Marathon, Marinette, Monroe, Oconto, Outagamie, Portage, Price, Rock, Sauk, Shawano, Washburn, Wood | Wisconsin | Ashland, Barron, Chippewa, Clark, Dane, Dodge, Douglas, Eau Claire, Florence, Forest, Grant, Iowa, Iron, Juneau, Lafayette, Langlade, Marathon, Marinette, Monroe, Oconto, Outagamie, Portage, Price, Rock, Sauk, Shawano, Washburn, Wood |
| Cedarburg Light & Water Utility | NPCDRB | AT&T Non-Participating Code for Cedarburg Light & Water Utility
Ozaukee | Wisconsin | Ozaukee |
| Central Wisconsin Electric Cooperative | NPCWEC | AT&T Non-Participating Code for Central Wisconsin Electric Cooperative
Marathon, Portage, Waupaca, and Shawano | Wisconsin | Marathon, Portage, Shawano, Waupaca |
| Charter Communications | CRTSSM | Sault Ste Marie, Soo ,Bruce ,Pickford ,Dafter, Kinross, Rudyard ,Chippewa, Trout lake, St Ignace, Moran, Pent land ,McMillan ,Garfield, Hudson (?), Hendricks, Newton, Muller, Doyle, Manistique, Germ fask,Hiawatha, Garden, Inwood , Fairbanks | Wisconsin | Chippewa, Delta, Florence, Lenawee, Marquette, Oakland |
| City of Evansville | NPCEVA | AT&T Non-Participating Code for City of Evansville
Rock, Green | Wisconsin | Green, Rock |
| City of Hartford | NPCHAR | AT&T Non-Participating Code for City of Hartford
washington, dodge | Wisconsin | Dodge, Washington |
| City of Oconomowoc | NPOCON | AT&T Non-Participating Code for City of Oconomowoc
Waukesha | Wisconsin | Waukesha |
| Columbus Water & Light | NPCLWL | AT&T Non-Participating Code for Columbus Water & Light
Columbus - Dodge County | Wisconsin | Dodge |
| Dunn Electric Cooperative | NPDUNN | AT&T Non-Participating Code for Dunn Electric Cooperative
Dunn, Barron, Chippewa, Pepin, Pierce, and St. Croix | Wisconsin | Barron, Chippewa, Dunn, Pepin, Pierce, St Croix |
| Jefferson Utilities | NPJEFF | AT&T Non-Participating Code for Jefferson Utilities
Jefferson | Wisconsin | Jefferson |
| Juneau Utilities | NPJUNE | AT&T Non-Participating Code for Juneau Utilities
Monroe, Juneau, Jackson, Sauk, Wood | Wisconsin | Jackson, Juneau, Monroe, Sauk, Wood |
| Kaukauna Utilities | NPKUWI | AT&T Non-Participating Code for Kaukauna Utilities
Outagamie | Wisconsin | Outagamie |
| Madison Gas & Electric | NPMGE | AT&T Non-Participating Code for Madison Gas & Electric
Columbia, Crawford, Dane, Iowa, Juneau, Monroe, and Vernon | Wisconsin | Columbia, Crawford, Dane, Iowa, Juneau, Monroe, Vernon |
| Manitowoc Public Utilities | NPMPU | AT&T Non-Participating Code for Manitowoc Public Utilities
Manitowoc, Brown | Wisconsin | Brown, Manitowoc |
| Mediacom Communications Lake Region | MEDLAK | Grant, Lafayette | Wisconsin | Grant, Lafayette |
| Mediacom Communications Lincoln Region | MEDLIN | Crawford, Juneau, Monroe, Vernon, Waupaca | Wisconsin | Crawford, Juneau, Monroe, Vernon, Waupaca |
| Menasha Utilities | NPMENA | AT&T Non-Participating Code for Menasha Utilities
Winnebago | Wisconsin | Winnebago |
| Mi-Tech (Alliant Energy) | MTCHWI | Contractor code for Mi-Tech to be used for Alliant Energy in Wisconsin | Wisconsin | Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood |
| Midcontinent Communications | MIDCWI | Village of Ellsworth | Wisconsin | Pierce |
| New London Utilities | NEWLDN | Waupaca and Outagamie counties | Wisconsin | Outagamie, Waupaca |
| Pierce Pepin Cooperative Services | NPPIER | AT&T Non-Participating Code for Pierce Pepin Cooperative Services
Pierce, Pepin, St. Croix, Buffalo | Wisconsin | Buffalo, Pepin, Pierce, St Croix |
| River Falls Municipal Utilities | RVRFLS | Pierce and St. Croix Counties, City of River Falls, WI | Wisconsin | Pierce, St Croix |
| Sheboygan Falls Utilities | SHBYGN | Sheboygan Falls, Wisconsin | Wisconsin | Sheboygan |
| St Croix Electric Co-op | NPSCEC | AT&T Non-Participating Code for St Croix Electric Co-op
Pierce, Dunn, Polk, St. Croix | Wisconsin | Dunn, Pierce, Polk, St Croix |
| Stoughton Utilities | STOUTI | City of Stoughton and portions of the surrounding townships (Dane County) | Wisconsin | Dane |
| Sturgeon Bay Utilities | NPSBUN | AT&T Non-Participating Code for Sturgeon Bay Utilities
Door | Wisconsin | Door |
| TDS - Alma WI ILEC | TDSALM | Cities of Alma and Nelson | Wisconsin | Buffalo |
| TDS - Elkhorn, Johnson Creek WI ILEC | TDSEJC | Cities of Elkhorn, Reeseville, Lowell, Juneau, Beaver Dam, Watertown, Helenville, Jefferson, Johnson Creek, Sullivan, Watertown | Wisconsin | Dodge, Jefferson, Walworth |
| TDS - Fox Valley Area WI CLEC Metrocom | TDSMW3 | Cities of Appleton, Kaukauna, Little Chute, Neenah, Green Bay, Oshkosh, Wausau | Wisconsin | Brown, Calumet, Marathon, Outagamie, Portage, Winnebago |
| TDS - Medford WI ILEC | TDSMED | Cities of Abbotsford, Athens, Chelsea, Curtiss, Dorchester, Gilman, Lublin, Medford, Owen, Rib Lake, Stetsonville, Westboro, Whittlesey, Withee | Wisconsin | Clark, Marathon, Taylor |
| TDS - Milwaukee Area WI CLEC Metrocom | TDSMW1 | Cities of Milwaukee, Racine, Kenosha,Brookfield, New Berlin, Franklin, Oak Creek, St Francis, Greenfield, Muskego, Waukesha, Pewaukee, Menomonee, Glendale, Fond du Lac | Wisconsin | Fond du Lac, Kenosha, Ozaukee, Racine, Washington, Waukesha |
| TDS - Monroe WI ILEC | TDSMON | Cities of Albany, Argyle, Belleville, Blanchardville, Brodhead, Brooklyne, Browntown, Evansville, Gratiot, Hollandale, Juda, Mineral Point, Monroe, Monticello, Mt Horeb, South Wayne, Woodford | Wisconsin | Dane, Green, Iowa, Lafayette, Rock |
| TDS - North Central WI ILEC | TDSNVM | Cities of Edgar, Mosinee, Chili, Granton, Greenwood, Loyal, Merillan, Neillsville, Owen, Spencer, Willard, Arpin, Auburndale, Babcock, Blenker, Chili, Clearfield, Granton, Junction City, Marshfield, Milladore, Mosinee, Necedah, Nekoosa, New Lisbon, Pittsville, Vesper, Wisconson Rapids, Marshfield | Wisconsin | Clark, Jackson, Juneau, Marathon, Portage, Wood |
| TDS - North East WI ILEC | TDSWNE | Cities of Bonduel, Cecil, Krakow, Navarino, Pulaski, Shawano, Shiocton, Zachow, Cleveland, Elkhart Lake, Haven, Howards Grove, Kiel, Newton, Plymouth, Sheboygan, Sheboygan Falls, Brillion, Chilton, Denmark, Forest Junction, Hilbert, Kaukauna, Kewaunee, Maribel, Menasha, Mishicot, Sherwood, Stockbridge, Tisch Mills, Two Rivers, Brillion, Cato, Chilton, Collins, Kiel, Manitowoc, Newton, Reedsville, St Nazianz, Valders, Amherst Junction, Iola, Manawa, Ogdensburg, Scandinavia, Waupaca | Wisconsin | Brown, Calumet, Kewaunee, Manitowoc, Portage, Shawano, Sheboygan, Waupaca |
| TDS - South Central WI CLEC Metrocom | TDSMW2 | Cities of Black Earth, Mazomanie, Blue Mounds, Cross Plains, Mt Horeb, Black Earth, Cross Plains, Dane, Madison, Mazomanie, Middleton, Mt Horeb, Verona, Waunakee, New Glarus, Madison, Verona, Oregon, Belleville, Blanchardville, Fitchburg, Mt. Horeb, Middleton, Monticello, Dane, DeForest, Lodi, Waunakee, Cottage Grove, McFarland, Merrimac, Oregon, Stoughton, Sun Prairie, Janesville, Beloit | Wisconsin | Columbia, Dane, Rock, Sauk |
| TDS - South West WI ILEC | TDSWSW | Cities of Cuba City, Jamestown Township, Dickeyville, Hazel Green, Kieler, Platteville, Potosi, Bagley, Bloomington, Boscobel, Fennimore, Glen Haven, Lancaster, Montfort, Mt Hope, Patch Grove, Praire Du Chein, Woodman, Beetwon, Bloomington, Cassville, Finnemore, Glen Haven, Lancaster, North Andover, Platteville, Potosi, Stitzer, Tennyson | Wisconsin | Grant |
| TDS - Waterford WI ILEC | TDSWAT | Cities of Bassett, Burlington, Genoa City, New Munster, Salem, Twin Lakes, Burlington, East Troy, Franksville, Honey Creek, Kansasville, Mt Pleasant, Mukwonago, Muskego, Rochester, Union Grove, Waterford, Wind Lake. | Wisconsin | Kenosha, Racine, Walworth, Waukesha |
| UScellular (The Grinnell Group) | USCLWI | All of Wisconsin | Wisconsin | Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood |
| Waupun Public Utilities | NPWAUP | AT&T Non-Participating Code for Waupun Public Utilities
Fond du Lac, Dodge | Wisconsin | Dodge, Fond du Lac |