| AT&T Mississippi | BSBNVL | Booneville Office; Alcorn - Corinth; Tippah - Blue Mountain; Prentiss - Baldwyn, Booneville; Tippah - Ripley,Walnut; Tishomingo - Belmont, Burnsville, Luka; Union - New Albany | Mississippi | Alcorn, Prentiss, Tippah, Tishomingo, Union |
| AT&T Mississippi | BSCLCS | Brooksville, Caldonia, Columbus, Columbus AFB, Ethel, Eupora, Kosciusko, Louisville, Maben, Macon, McCool, Shuqulak, Starkville, Sturgis, & West Point. Counties include Attala, Clay, Lownkdes, Noxubee, Oktibbeha, Webster and Winston | Mississippi | Attala, Clay, Lowndes, Noxubee, Oktibbeha, Webster, Winston |
| AT&T Mississippi | BSGCEA | Gulf Coast East Office; Edgewater, D'Iberville, Biloxi in Harrison Co. Moss Point Gautier, Hurley, Pascagoula, Ocean Springs, Lucedale and Vancleve in Jackson Co. Lucedale in George Co. The dividing line of BSGCEA is east side of Courthouse Rd. | Mississippi | George, Greene, Harrison, Jackson |
| AT&T Mississippi | BSGCWE | Gulf Coast West Office; Bay St. Louis, Bayou LaTerre, Pass Christian, Pearlington, Lyman,Gulfport in Harrison Co. Poplarville and Picayune are in Pearl River Co. while Wiggins is in Stone Co. The dividing line for BSGCWE is west of Courthouse Rd. | Mississippi | Hancock, Harrison, Pearl River, Stone |
| AT&T Mississippi | BSGRND | Batesville, Charleston, Oakland, Sumner, Tutwiler, Duncan, Clarksdale, Marks, Grenada, Duck Hill, Jonestown and Friars Point | Mississippi | Grenada, Montgomery, Panola, Quitman, Tallahatchie |
| AT&T Mississippi | BSGVCS | Greenville, Benoit, Cleveland, Drew, Gunnison, Leland Pace, Ruleville, Rosedale, Shelby, Rolling Fork & Hollandale | Mississippi | Bolivar, Sharkey, Sunflower, Washington |
| AT&T Mississippi | BSGWCS | Carroll, Holmes, Humphreys, Leflore, Montgomery, Sunflower and Yazoo Counties | Mississippi | Carroll, Holmes, Humphreys, Leflore, Montgomery, Sunflower, Yazoo |
| AT&T Mississippi | BSHRNN | Coahoma County - Lula; DeSoto County - Hernando, Nesbit, Walls; Panola County - Crenshaw, Como, Sardis; Tate County - Coldwater, Independence, Senatobia; Tunica County - Tunica | Mississippi | Coahoma, De Soto, Panola, Tate, Tunica |
| AT&T Mississippi | BSHTCS | HATTIESBERG CUSTOMER SER.TEAM - Covington County (Collins, Hattiesburg Main, Sumrall); Forrest County (Brooklyn, Hattiesburg Main, Hattiesburg West, Lumberton, Petal, Purvis); Green County (Mclain, Richton); Jones County (Ellisville, Hattiesburg Main, Richton); Lamar County (Hattiesburg West, Lumberton, Purvis, Sumrall); Marion County (Columbia); Perry County (Beaumont, McLain, Richton); Simpson County (Magee, Mendenhall) Wayne County (Richton) | Mississippi | Covington, Forrest, Greene, Jones, Lamar, Marion, Perry, Simpson, Wayne |
| AT&T Mississippi | BSJKCS | Vicksburg, Windsor Rd, Utica, Edwards, Bolton, Flora, Canton, Madison, Pearl, Pelahatchie, Brandon, NW Rankin, Raymond, Terry, Clinton, Flowood, Ridgeland, Jackson (Belvedere, Meadowbrook, Capital Pearl, Ridgewood) | Mississippi | Hinds, Jefferson, Madison, Rankin, Warren |
| AT&T Mississippi | BSLARL | Laurel Customer Service Team Wire Centers - Quitman, Waynesboro, Stringer, Laurel, Sandersville, Ellisville, Collins, Mt Olive, Seminary, Richton, Taylorsville, Raleigh, Mize | Mississippi | Clarke, Covington, Greene, Jasper, Jones, Perry, Simpson, Smith, Wayne |
| AT&T Mississippi | BSMRCS | Meridian - Counties include Clarke, Jasper, Kemper, Lauderdale, Neshoba, Newton, Scott and Wayne | Mississippi | Clarke, Jasper, Kemper, Lauderdale, Leake, Neshoba, Newton, Scott, Wayne |
| AT&T Mississippi | BSNZCS | Adams County (Natchez); Amite County (Centreville, Gloster, Liberty, Magnolia, Smithdale, Summit); Claiborne County (Port Gibson & Windsor Rd); Copiah County (Beauregard, Crystal Springs, Hazlehurst, Terry, Utica, Wesson); Franklin County (Mccall Creek, Roxie, Smithdale); Jefferson County (Fayette, Natchez); Lawrence County (Jayess, Monticello, Silver Creek, Sontag, Wesson); Lincoln County (Bogue Chitto, Brookhaven, Ruth, Smithdale, Summit, Wesson); Pike County (Magnolia, Mccomb, Osyka, Summit); Walthall County (Tylertown); Wilkinson County (Centreville, Woodville) | Mississippi | Adams, Amite, Claiborne, Copiah, Franklin, Jefferson, Lawrence, Lincoln, Pike, Walthall, Wilkinson |
| AT&T Mississippi | BSOXFR | Oxford, Water Valley, Coffeeville, Potts Camp, Ashland and Holly Springs | Mississippi | Lafayette, Marshall, Yalobusha |
| AT&T Mississippi | BSTSOH | Southaven, Walls, Horn Lake, Lake Cormorant - Desoto County | Mississippi | De Soto |
| AT&T Mississippi | BSTUCS | Lee - Tupelo, Shannon, Saltillo, Verona; Pontotoc - Pontotoc | Mississippi | Alcorn, Chickasaw, Lee, Monroe, Pontotoc, Prentiss, Tippah, Tishomingo, Union |
| AT&T Mississippi Mobility | ATTMMS | AT&T Mobility - Mississippi | Mississippi | Adams, Alcorn, Amite, Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw, Claiborne, Clarke, Clay, Coahoma, Copiah, Covington, De Soto, Forrest, Franklin, George, Greene, Grenada, Hancock, Harrison, Hinds, Holmes, Humphreys, Issaquena, Itawamba, Jackson, Jasper, Jefferson, Jefferson Davis, Jones, Kemper, Lafayette, Lamar, Lauderdale, Lawrence, Leake, Lee, Leflore, Lincoln, Lowndes, Madison, Marion, Marshall, Monroe, Montgomery, Neshoba, Newton, Noxubee, Oktibbeha, Panola, Pearl River, Perry, Pike, Pontotoc, Prentiss, Quitman, Rankin, Scott, Sharkey, Simpson, Smith, Stone, Sunflower, Tallahatchie, Tate, Tippah, Tishomingo, Tunica, Union, Walthall, Warren, Washington, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo |
| Bailey Cable TV, Inc. | BCTV01 | Smith(Taylorsville), Clairborne, Lincoln, Copiah, Hinds, Simpson, & Covington Counties | Mississippi | Claiborne, Copiah, Covington, Hinds, Lincoln, Simpson, Smith |
| Bay Springs Telephone | CAT040 | Montrose,Louin,Bay Springs,Stringer,Soso | Mississippi | Jasper, Jones |
| Bolivar Energy Authority | BEAMS | Northcentral Benton County, MS to the Blackjack community | Mississippi | Benton |
| Bruce Telephone Company | BRUCE | Calhoun County – Bruce, MS 38915, Pittsboro, MS 38951, Vardaman, MS 38878, Big Creek, MS 38914 | Mississippi | Calhoun |
| Cable ONE | CAT001 | Gulfport, Lyman, Saucier, Long Beach, Pass Christian, Delisle & Diamondhead | Mississippi | Hancock, Harrison |
| Cable ONE | CAT004 | All of Biloxi including Woolmarket - D'Iberville - Ocean Springs - Vancleve -Ocean Springs east to hwy 57- Gulf Park Estates- hwy 15 area up to the new fire station by Conventry Estates -3 Rivers Road Area -Latimer Comm north of Ocean Springs | Mississippi | Harrison, Jackson |
| Cable ONE | CAT007 | Pascagoula & Moss Point | Mississippi | Jackson |
| Cable ONE | CAT347 | Adams Co - Natchez, Vidalia, LA | Mississippi | Adams |
| Cable ONE | CAT398 | Brookhaven, Boguechitto, Fernwood, McComb, Magnolia, Wesson & Summit - Pike and Lincoln Counties. | Mississippi | Lincoln, Pike |
| Cable ONE | CBL1MS | Grenada Co., Tallahachie Co., state of Mississippi | Mississippi | Grenada, Montgomery, Tallahatchie |
| CE Fiber | CEFBR | Pearl River County, Hancock County, Harrison County | Mississippi | Hancock, Harrison, Pearl River |
| CENTRAL ELECTRIC POWER ASSOCIATIOIN | CEPA | Brandon, Carthage, Duffee, Forest, Harperville/Sebastopol, Lena, Lake, Morton, Philadelphia, Pelahatchie, Kosciusko, Union, Walnut Grove and West | Mississippi | Attala, Kemper, Leake, Neshoba, Newton, Rankin, Scott |
| CenturyTel Fiber Co. II | CENTEL | Harrison County | Mississippi | Harrison |
| Charter Communications | CAT021 | Picayune/Carriere | Mississippi | Pearl River |
| Chickasaw Electric Coop | CHKEC2 | Marshall, Benton counties | Mississippi | Benton, Marshall |
| City of Jackson | JANWTR | City of Jackson, Mississippi located in Hinds County | Mississippi | Hinds |
| Clarksdale Public Utilities | CLAPUB | Coahoma County | Mississippi | Coahoma |
| Coast Electric Power Association | COAST | Bay St. Louis, Biloxi, Gulfport, Picayune, Poplarville & small outlying areas | Mississippi | Hancock, Harrison, Pearl River |
| Coast Electric Power Association | CPAHAN | Hancock County | Mississippi | Hancock |
| Coast Electric Power Association | CPAHAR | Harrison County | Mississippi | Harrison |
| Coast Electric Power Association | CPAPRC | Pearl River County | Mississippi | Pearl River |
| Columbus Light & Water | CMBSLW | City of Columbus, MS within parts of Lowndes County | Mississippi | Lowndes |
| Comcast Mississippi | CAT010 | Forrest County -- serving Hattiesburg; Petal; Rawls Springs; Lamar County -- serving Purvis, and the Oak Grove area | Mississippi | Forrest, Lamar |
| Comcast Mississippi | CAT013 | Laurel, Ellisville and Sandersville | Mississippi | Jasper, Jones |
| Comcast Mississippi | CAT015 | Lauderdale County (Briarwood, Causeyville, Collinsville, Lauderdale, Meridian, Marion, Russell, Obadiah & Toomsuba); Clarke County (Pachuta, Heidelberg & Vossburg) | Mississippi | Clarke, Lauderdale |
| Comcast Mississippi | CCCJAX | Formerly Time Warner Jackson - Hinds County:Jackson, Clinton, Edwards, Raymond, Bolton, Madison County: Madison, Ridgeland, Rankin County: Florence, Cleary, Richland | Mississippi | Hinds, Madison, Rankin |
| Comcast Mississippi | COMRKN | Formerly SUSQUEHANNA COMMUNICATIONS - Madison, Pearl, Pelahatchie & Brandon Counties | Mississippi | Madison |
| Comcast Mississippi | COMSOH | Sardis, Hernando, Desoto County, Southaven, Horn Lake, Olive Branch, Byhalia, Marshall County, Senatobia, Como, Coldwater, Tate County, Robinsonville, Tunica, Tunica County, Crenshaw, Sledge, Strayhorn, Memphis Ms., Lake Comerant, Walnut, Independence | Mississippi | De Soto, Marshall, Tate, Tunica |
| Conexon Connect, LLC | CONXMS | Mississippi (all counties) | Mississippi | Adams, Alcorn, Amite, Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw, Claiborne, Clarke, Clay, Coahoma, Copiah, Covington, De Soto, Forrest, Franklin, George, Greene, Grenada, Hancock, Harrison, Hinds, Holmes, Humphreys, Issaquena, Itawamba, Jackson, Jasper, Jefferson, Jefferson Davis, Jones, Kemper, Lafayette, Lamar, Lauderdale, Lawrence, Leake, Lee, Leflore, Lincoln, Lowndes, Madison, Marion, Marshall, Monroe, Montgomery, Neshoba, Newton, Noxubee, Oktibbeha, Panola, Pearl River, Perry, Pike, Pontotoc, Prentiss, Quitman, Rankin, Scott, Sharkey, Simpson, Smith, Stone, Sunflower, Tallahatchie, Tate, Tippah, Tishomingo, Tunica, Union, Walthall, Warren, Washington, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo |
| Crown Castle | CRWNMS | Lafayette County | Mississippi | Lafayette |
| Delta Electric Power Association | DELEPA | All or part of Attala, Bolivar, Carroll, Choctaw, Grenada, Holmes, Humphreys, Leflore, Montgomery, Sunflower, Tallahatchie, Washington and Webster Counties | Mississippi | Attala, Bolivar, Carroll, Choctaw, Grenada, Holmes, Humphreys, Leflore, Montgomery, Sunflower, Tallahatchie, Washington, Webster |
| Dixie Electric Power Association | DEPAL | Laurel District - Extreme south part of Jasper County, extreme east side of Covington County, north of Hwy 84. Jones County east of Leaf River from Covington County line to Hwy 590, then easterly through Ellisville to the west side of Hwy 29 and south into Perry County north of Runnelstown and Richton,and north along the Jones/Wayne County line covering almost all of the north 1/2 and east 1/2 of Jones County. A small portion in Wayne Count along the west county line. | Mississippi | Covington, Jasper, Jones, Perry, Wayne |
| Dixie Electric Power Association | DEPAP | Petal District - Extreme part of Covington County south of Hwy 84. Jones County west of Leaf River to Hwy 590 and south of Ellisville and west of Hwy 29. Forrest County north and east of Hattiesburg and Petal and north of Hwy 98. Perry County along Pumping Station Road and north of Hwy 42 from Runnelstown to just east of Richton and south to Hwy 98. | Mississippi | Covington, Forrest, Jones, Perry |
| Dixie Electric Power Association | DEPAW | Waynesboro District - Extreme south part of Clarke County. Parts of Jones County along the eastern county line and in the Chickasahay National Forest along CR 201, CR 218, and Old Culpepper Road. All of Wayne Count except northeast corner and very south part. | Mississippi | Clarke, Jones, Perry, Wayne |
| EAST MS EPA | EMEPAL | Winston, Kemper, Attalla, Noxubee, and Neshoba Counties | Mississippi | Attala, Kemper, Neshoba, Noxubee, Winston |
| EAST MS EPA | EMEPAM | Lauderdale, Clarke, Newton, Jasper, Wayne Counties | Mississippi | Clarke, Jasper, Lauderdale, Newton, Wayne |
| Entergy | ENTBHN | Brookhaven, Crystal Springs, Fernwood, Georgetown, Hazelhurst, Magnolia, McComb, Monticello, Osyka, Prentiss, Silver Creek and Tylertown | Mississippi | Amite, Copiah, Franklin, Jefferson Davis, Lincoln, Pike, Simpson, Walthall, Wilkinson |
| Entergy | ENTCLN | Bolton, Clinton, Edwards, Learned, Raymond, Terry and Utica | Mississippi | Hinds |
| Entergy | ENTCLV | Cleveland, Drew, Glendora, Greenwood, Indianola, Inverness, Itta Bena, Minter City, Moorhead, Rosedale, Ruleville, Shaw, Shelby, Sumner, Sunflower, & Tutwiler | Mississippi | Bolivar, Humphreys, Leflore, Sunflower, Tallahatchie |
| Entergy | ENTGNV | Anguilla, Arcola, Benoit, Cary, Glen, Greenville, Hollandale, Leland, Rolling Fork & Scott | Mississippi | Sharkey, Washington |
| Entergy | ENTGRN | Carrollton, Charleston, Courtland, Duck Hill, Holcomb, Gore Springs, Grenada, Kilmichael, North Carrollton, Pope, Stuart, Tomnolen & Winona | Mississippi | Grenada, Montgomery, Panola, Tallahatchie, Webster, Yalobusha |
| Entergy | ENTKOS | Carthage, Durant, Ethel, French Camp Goodman, Kosciusko, McAdams, McCool, Thomastown, & Sallis. | Mississippi | Attala, Choctaw, Leake, Madison |
| Entergy | ENTLEX | Camden, Durant, Goodman, Lexington, Pickens, Sallis, Tchula & West | Mississippi | Attala, Holmes, Madison, Yazoo |
| Entergy | ENTMAD | Bentonia, Canton, Flora, Madison and Ridgeland | Mississippi | Madison, Yazoo |
| Entergy | ENTNAT | Bude, Centreville, Crosby, Fayette, Gloster, Liberty, Natchez, Meadville, Roxie and Woodville | Mississippi | Adams, Amite, Franklin, Jefferson, Wilkinson |
| Entergy | ENTRNK | Brandon, Braxton, D'lo,Florence, Flowood, Magee, Mendenhall, Mize, Morton, Mt. Olive, New Hebron, Pearl, Pelahatchie, Raleigh, Richland and Star | Mississippi | Rankin, Scott, Simpson, Smith |
| Entergy | ENTSEN | Clarksdale, Coldwater, Como, Friars Point, Jonestown, Lambert, Marks, Robinsonville, Sardis, Sarah and Senatobia | Mississippi | Coahoma, Quitman, Tate, Tunica |
| Entergy | ENTSJK | Jackson | Mississippi | Hinds |
| Entergy | ENTSOH | Hernando, Horn Lake, Lake Cormorant, Nesbit, Southaven & Walls | Mississippi | De Soto |
| Entergy | ENTTRN | Transmission line poles for entire service area | Mississippi | Adams, Amite, Attala, Bolivar, Choctaw, Claiborne, Coahoma, Copiah, Covington, De Soto, Franklin, Grenada, Hinds, Holmes, Humphreys, Jefferson, Jefferson Davis, Lawrence, Leake, Leflore, Lincoln, Madison, Montgomery, Panola, Pike, Quitman, Rankin, Scott, Simpson, Smith, Sunflower, Tallahatchie, Tate, Tunica, Walthall, Warren, Washington, Webster, Wilkinson, Yazoo |
| Entergy | ENTVIC | Bovina, Flowers, Port Gibson and Vicksburg | Mississippi | Claiborne, Warren |
| Extenet Systems | XNETMS | All of Mississippi | Mississippi | Adams, Alcorn, Amite, Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw, Claiborne, Clarke, Clay, Coahoma, Copiah, Covington, De Soto, Forrest, Franklin, George, Greene, Grenada, Hancock, Harrison, Hinds, Holmes, Humphreys, Issaquena, Itawamba, Jackson, Jasper, Jefferson, Jefferson Davis, Jones, Kemper, Lafayette, Lamar, Lauderdale, Lawrence, Leake, Lee, Leflore, Lincoln, Lowndes, Madison, Marion, Marshall, Monroe, Montgomery, Neshoba, Newton, Noxubee, Oktibbeha, Panola, Pearl River, Perry, Pike, Pontotoc, Prentiss, Quitman, Rankin, Scott, Sharkey, Simpson, Smith, Stone, Sunflower, Tallahatchie, Tate, Tippah, Tishomingo, Tunica, Union, Walthall, Warren, Washington, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo |
| Fulton Telephone Company | FULTON | Itawamba County – Fulton 38843, Mantachie 38855, Tremont 38876, Fairview 38847 | Mississippi | Itawamba |
| Greenwood Utilities | GRNWDU | 6 square miles of electrical coverage in Leflore County and area with a one (1) outliers in Carroll County. | Mississippi | Carroll, Leflore |
| Level 3 Communications | LV3JCK | Hinds, Rankin, Madison, and Warren counties | Mississippi | Hinds, Madison, Rankin, Warren |
| Magnolia Electric Power | MEP | Pike County (Osyka, Magnolia, McComb and Summit); Lincoln County (Brookhaven, Bogue Chitto); Amite County (Smithdale, Liberty, Gloster); Marion County (Columbia); Lawrence County (Monticello); Walthall County (Tylertown); Franklin County | Mississippi | Amite, Franklin, Lawrence, Lincoln, Marion, Pike, Walthall |
| MaxxSouth Broadband | CAT033 | Formerly Mediacom/MetroCast Communcations - Decatur, Forest, Houston, Louisville, Morton, Pontotoc, Raleigh, Water Valley, Newton, Union, & Oktibbeha | Mississippi | Leake, Neshoba, Newton, Oktibbeha, Pontotoc, Scott, Smith, Union, Winston, Yalobusha |
| Media 3 | CAT020 | Collins, Columbia, Lumberton, Poplarville, Sumrall, and Tylertown
Note - This code is outdated and does not have any valid contacts or users associated to it. 2/17/2020 | Mississippi | Covington, Lamar, Marion, Pearl River, Walthall |
| Mediacom Communications | MEDCOM | Bay St. Louis, Waveland, Beaumont, Lucedale and Wiggins | Mississippi | George, Hancock, Perry, Stone |
| Mississippi Power | MPCGPT | Coast Division - Bay St. Louis, Biloxi, Carriere, Gulfport, Leakesville, Long Beach, Lucedale, Moss Point, Ocean Springs, Pascagoula, Pass Christian, Picayune, Poplarville, Waveland and Wiggins | Mississippi | George, Greene, Hancock, Harrison, Jackson, Pearl River, Stone |
| Mississippi Power | MPCHBG | Pine Belt Division - Bassfield, Bay Springs, Beaumont, Columbia, Ellisville, Hattiesburg, Heidelberg, Laurel, Lumberton, McLain, Petal, Purvis, Richton, Sandersville, Sanford Seminary, Sumrall, Taylorsville, and Waynesboro | Mississippi | Covington, Forrest, Jasper, Jefferson Davis, Jones, Lamar, Marion, Perry, Smith, Wayne |
| Mississippi Power | MPCMDN | Meridian Division - Chunky, Decatur, Forest, Harperville, Hickory, Lake, Meridian, Newton, Pachuta, Quitman, Shubuta, Stonewall, and Union | Mississippi | Clarke, Lauderdale, Leake, Neshoba, Newton, Scott |
| Natchez Trace EPA | NTEPA | Chickasaw, Calhoun, Clay, Grenada, Pontotoc, Yalobusha and Webster | Mississippi | Calhoun, Chickasaw, Clay, Grenada, Pontotoc, Webster, Yalobusha |
| New Albany Light Gas and Water | NALGW | Union, Tippah, Benton, Lee, and Marshall | Mississippi | Benton, Lee, Marshall, Tippah, Union |
| NewWave Communications | CMA013 | Formerly CMA Communications - Buckatunna, Clara, Enterprise, Qutiman, Stonewall, and Waynesboro | Mississippi | Clarke, Wayne |
| North East Mississippi Electric Power Association | NEMEPA | Lafayatte, Some of Marshall, Union, Pontotoc, and Benton | Mississippi | Benton, Lafayette, Marshall, Pontotoc, Union |
| Northcentral Electric Cooperative | NMEPA | Parts of DeSoto, Marshall, Tate & Lafayette counties | Mississippi | De Soto, Lafayette, Marshall, Tate |
| PEARL RIVER VALLEY EPA | PRVEPA | Covington, Forrest, George, Jackson, Jefferson Davis, Lamar, Lawrence, Marion, Pearl River, Perry, Stone, and Walthall Counties | Mississippi | Covington, Forrest, George, Jackson, Jefferson Davis, Lamar, Lawrence, Marion, Pearl River, Perry, Stone, Walthall |
| Pickwick Electic Cooperative | PICKMS | Tishomingo County, north of Yellow Creek and in the extreme northwest corner of the county; Alcorn County, along the TN/MS state line | Mississippi | Alcorn, Tishomingo |
| Public Service Commission Of Yazoo | PSCYC | | Mississippi | Yazoo |
| Singing River EPA | SREPAG | Hurley, Moss Point, Pascagoula, Gautier, Ocean Springs, VanCleve, Biloxi and D'Iberville - Jackson County, Harrison County(East D’Iberville), Stone County (Southeast McHenry) | Mississippi | Harrison, Jackson, Stone |
| Singing River EPA | SREPAL | George, Greene, Perry (Richton, Beaumont), Wayne (Stateline, South Buckatunna) | Mississippi | George, Greene, Perry, Wayne |
| Sky Cablevision | SKYCMS | Comments County: Choctaw: Gilbertown; Clarke County: Coffeeville; Greene County: Boligee, Eutaw, Gainesville, Forkland; Washington County: Chatom, Millry | Mississippi | Choctaw, Clarke, Greene, Marion, Perry, Washington |
| Southern Pine EPA - Brandon District | SPEPA2 | Brandon, Florence, Puckett, Morton, Pulaski, Harrisville North, Dry Creek, Martinville North, Polkville | Mississippi | Hinds, Rankin, Scott, Simpson, Smith |
| Southern Pine EPA - New Hebron District | spepa3 | Crystal, Hazelhurst, Bassfield, Prentiss, Silvercreek, Monticello, Beureguard, Georgetown, Braxton, Mendenhall, Carson, New Hebron, Magee West, Harrisville South | Mississippi | Copiah, Covington, Jefferson Davis, Lawrence, Lincoln, Simpson |
| Southern Pine EPA - Newton District | SPEPA4 | Union, Lake, Pineville, Raliegh, Forest, Sylvarena North, Louin, Montrose, Newton, Decatur, Hickory, Chunky, Rose Hill, Homewood, Lorena | Mississippi | Clarke, Jasper, Leake, Newton, Scott, Smith |
| Southern Pine EPA - Taylorsville District | SPEPA6 | Magee East, Mount Olive, Collins, Seminary, Hot Coffee, Rawls Springs, Hattiesburg, Taylorsville, Mize, Bay Springs, Heidelburg, Vossburg, Paulding, Martinville South, Stringer, Moss, Sylvarean South | Mississippi | Clarke, Covington, Forrest, Jasper, Jefferson Davis, Jones, Lamar, Simpson, Smith |
| Southwest Mississippi EPA | SWMEPA | Counties include Hinds, Copiah, Claiborne, Lincoln, Jefferson, Amite, Adams, Wilkinson and Franklin | Mississippi | Adams, Amite, Claiborne, Copiah, Franklin, Hinds, Jefferson, Lincoln, Wilkinson |
| Starkville Utilities | STRKVL | City of Starkville, MS | Mississippi | Oktibbeha |
| Suddenlink Communications (Altice) | SDLGNV | Washington County | Mississippi | Leflore, Sunflower, Washington |
| T.A.T. CABLE | TATCAB | Note: Code has no active users or contacts
Flora | Mississippi | Madison |
| Tallahatchie Valley EPA | TVEPA | Panola, Tate, Tallahatchie, Yalobusha, Tunica, Lafayette, Grenada, Quitman, & Calhoun Counties | Mississippi | Calhoun, Grenada, Lafayette, Panola, Quitman, Tallahatchie, Tate, Tunica, Yalobusha |
| TDS Telecom | TDSMSP | Leakesville, Stateline, Sandhill, Neely, Calhoun City, Slate Springs, Vardaman and Myrtle | Mississippi | Benton, Calhoun, Chickasaw, Greene, Grenada, Perry, Union, Wayne, Webster, Yalobusha |
| TEC of Jackson, Inc. | TECJMS | Scott, Newton, Smith, Simpson, Covington, Copiah, Lawrence County. MS | Mississippi | Copiah, Covington, Lawrence, Newton, Scott, Simpson, Smith |
| TecInfo Communications, LLC | TECINF | Glen Allan, Hollandale, Arcola, Greenville, Leland, Benoit, Rosedale, Indianola, Cleveland, Ruleville, Drew (Washington, Bolivar, and Sunflower Counties) | Mississippi | Bolivar, Sunflower, Washington |
| Telepak Networks, Inc dba C Spire | CSPRMS | Covers the State of Mississippi | Mississippi | Adams, Alcorn, Amite, Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw, Claiborne, Clarke, Clay, Coahoma, Copiah, Covington, De Soto, Forrest, Franklin, George, Greene, Grenada, Hancock, Harrison, Hinds, Holmes, Humphreys, Issaquena, Itawamba, Jackson, Jasper, Jefferson, Jefferson Davis, Jones, Kemper, Lafayette, Lamar, Lauderdale, Lawrence, Leake, Lee, Leflore, Lincoln, Lowndes, Madison, Marion, Marshall, Monroe, Montgomery, Neshoba, Newton, Noxubee, Oktibbeha, Panola, Pearl River, Perry, Pike, Pontotoc, Prentiss, Quitman, Rankin, Scott, Sharkey, Simpson, Smith, Stone, Sunflower, Tallahatchie, Tate, Tippah, Tishomingo, Tunica, Union, Walthall, Warren, Washington, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo |
| Twin County EPA | TCEPA1 | Greenville, Leland, Avon, Hollandale, Arcola, Belzoni, Isola, Rolling Fork, Grace, Myersville, Onward, Valley Park, Glen Allen, Anguilla, Delta City and Metcalf | Mississippi | Humphreys, Issaquena, Leflore, Sharkey, Sunflower, Warren, Washington |
| Ultra Communications | ULTMS | Clarke, Sharkey, Wayne, Washington | Mississippi | Clarke, Sharkey, Washington, Wayne |
| Uniti Fiber | INLIMS | All of Mississippi
Formerly Inline | Mississippi | Adams, Alcorn, Amite, Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw, Claiborne, Clarke, Clay, Coahoma, Copiah, Covington, De Soto, Forrest, Franklin, George, Greene, Grenada, Hancock, Harrison, Hinds, Holmes, Humphreys, Issaquena, Itawamba, Jackson, Jasper, Jefferson, Jefferson Davis, Jones, Kemper, Lafayette, Lamar, Lauderdale, Lawrence, Leake, Lee, Leflore, Lincoln, Lowndes, Madison, Marion, Marshall, Monroe, Montgomery, Neshoba, Newton, Noxubee, Oktibbeha, Panola, Pearl River, Perry, Pike, Pontotoc, Prentiss, Quitman, Rankin, Scott, Sharkey, Simpson, Smith, Stone, Sunflower, Tallahatchie, Tate, Tippah, Tishomingo, Tunica, Union, Walthall, Warren, Washington, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo |
| Uniti Fiber | PEGMS | Clarke, Forrest, Hinds, Jasper, Jones, Lamar, Lauderdale, Lawrence, Leake, Madison, Neshoba, Pearl River, Rankin, Warren Counties
Formerly Peg Bandwidth | Mississippi | Clarke, Forrest, Hinds, Jasper, Jones, Lamar, Lauderdale, Lawrence, Leake, Madison, Neshoba, Pearl River, Rankin, Warren |
| Uniti Fiber | SLPNSM | George, Greene, Hancock, Harrison, Jackson, Perry, Stone Counties
Formerly Southern Light | Mississippi | George, Greene, Hancock, Harrison, Jackson, Perry, Stone |
| Vicksburg Video | VICVID | Vicksburg and Bovina in Warren County | Mississippi | Warren |
| Windstream Mississippi | WNDRSJ | Rankin, Simpson and Jefferson Davis Counties | Mississippi | Jefferson Davis, Rankin, Simpson |
| Windstream Mississippi KDL | KDLMS | Formerly KDL - Biloxi and Pascagoula | Mississippi | Harrison, Jackson |
| XO Communications Services | XOCSMS | MISSISSIPPI – Desoto County | Mississippi | De Soto |
| Yazoo Valley Electric Power | YAZVAL | Yazoo, Warren, Holmes, Humphries, Sharkey, and Issaquena Counties | Mississippi | Holmes, Humphreys, Issaquena, Sharkey, Yazoo |
| Zayo Fiber Solutions | ZAYTUN | Desoto and Tunica Counties | Mississippi | De Soto, Tunica |