Definition
A Bell Operating Company is one of the regional telephone companies that historically provided local landline telephone service in the United States. In FAA documentation, BOC appears in the context of telecommunications infrastructure used to support flight service stations, weather briefing lines, and other aviation communication services that depend on commercial telephone circuits.
Plain English
A regional phone company that supplies the landline telephone service used by some FAA facilities and pilot briefing lines.
Context Anchor
Seen in FAA acronym lists and in communication or facility-support contexts, not as a normal cockpit control or aircraft system.
Derivation
Named after the Bell System, the original American telephone network founded by Alexander Graham Bell. After the Bell System was broken up in 1984, the regional companies that kept providing local service became known as Bell Operating Companies.
Why Pilots Care
A pilot is unlikely to use this term while flying, but recognizing it prevents confusing a communications-support company with an aircraft or navigation term.
Intuition Check
Do not read BOC as an aircraft system or cockpit item here. In this context, it means a telephone service company.
Example Sentence 1
The flight service station's voice briefing line is delivered over circuits leased from the local Bell Operating Company.
Example Sentence 2
Pilots filing certain flight plans may encounter BOC references when dealing with ground communication infrastructure.