| 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 | VZBMET | Verizon Baltimore Metro (Harford, Baltimore County, Baltimore City, Howard, Anne Arundel, Carroll) | Maryland | Anne Arundel, Baltimore, Baltimore City, Carroll, Harford, Howard |
| 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 | VZWSAM | Verizon MD (DC suburbs) (Prince George's, Montgomery) | Maryland | Montgomery, Prince George's |
| Verizon Maryland LLC | VZSMCO | Southern Maryland used by SMECO | Maryland | Calvert, Charles, Prince George's, St. Mary's |