The term "911" functions as a proper noun. It is the specific name designated for the emergency telephone number and the resulting dispatch service in North America (primarily the United States and Canada). As a proper noun, it identifies a unique entity, similar to a brand name or the name of a person.
In linguistic analysis, while "911" is a numeral, its function within the phrase "Call 911" is not to quantify but to name the service being called. It connects a caller to a Public Safety Answering Point (PSAP), which dispatches emergency responders such as police, firefighters, and paramedics. The term has become so culturally ingrained that it can also act as a noun adjunct (or attributive noun) to modify another noun, as in "a 911 emergency" or "a 911 dispatcher," where it describes the type of emergency or dispatcher.
Therefore, for the purpose of an article, the main point is that "911" is a proper noun representing the official emergency response system in specific English-speaking countries. Unlike a generic term like "emergency number," "911" is the specific identifier for that particular system. The query "911 bahasa inggris" (Indonesian for "911 English language") seeks to understand this specific term, which does not translate but is adopted directly as the system's name.
