| Comcast Maryland | COMSOMD | Southern Maryland | Maryland | Calvert, Charles, St. Mary's |
| MetroCast Communications | METRO1 | Charles, St. Mary's County, MD | Maryland | Charles, St. Mary's |
| Southern Maryland Electric Cooperative | SMECO1 | Southern Maryland | Maryland | Calvert, Charles, Prince George's, St. Mary's |
| Southern Maryland Electric Cooperative | SMECO2 | Southern Maryland | Maryland | Calvert, Charles, St. Mary's |
| Verizon Maryland | VZMES | Verizon Maryland Eastern Shore (Harford, Cecil, Somerset, Caroline, Kent, Queen Anne’s, Talbot, Dorchester, Wicomico, Worcester) | Maryland | Caroline, Cecil, Dorchester, Harford, Kent, Queen Anne's, Somerset, Talbot, Wicomico, Worcester |
| Verizon Maryland | VZWMD | Verizon Western Maryland (Garrett, Washington, Frederick, Alleghany, Carroll) | Maryland | Allegany, Carroll, Frederick, Garrett, Washington |
| Verizon Maryland LLC | VZSMCO | Southern Maryland used by SMECO | Maryland | Calvert, Charles, Prince George's, St. Mary's |