| Verizon Delaware LLC | |
| Type: | Subsidiary of Verizon |
| Former Name: | The Diamond State Telephone Company Bell Atlantic - Delaware, Inc. |
| Location: | Wilmington, Delaware |
| Industry: | Telecommunications |
| Area Served: | Delaware |
| Products: | Local Telephone Service |
| Parent: | American Bell (1897-1899) AT&T (1899-1983) Bell Atlantic/Verizon (1984-present) |
| Homepage: | Verizon Delaware |
Verizon Delaware LLC, formerly The Diamond State Telephone Company, is the Bell Operating Company of Delaware, and small parts of southeastern Pennsylvania. Founded in 1897, it became a part of the Bell System in 1905.[1] When the AT&T breakup occurred in 1984, DST became managed by the Regional Bell Operating Company Bell Atlantic.[1] In 1994, Bell Atlantic chose to "unify" its brand by legally renaming all of its telephone companies — including Diamond State Telephone to "Bell Atlantic – Delaware, Inc".
After the 2000 merger with GTE, Bell Atlantic – Delaware, Inc. became known as Verizon Delaware, Inc., and later as Verizon Delaware LLC.