What is the designation of 9-1-1 commonly known as?

The designation of 9-1-1 is commonly known as the universal emergency number. This term reflects its recognition as a singular, standardized contact point for individuals in need of immediate emergency assistance across various regions, primarily in the United States and Canada. The universal nature of this number allows for quick identification and access by the public during times of crisis, regardless of location.

While "emergency contact number" might imply various emergency numbers in different contexts, it doesn't capture the global recognition and operational standard that 9-1-1 has achieved. Terms like "standard service number" and "public safety hotline" do not specifically convey the immediate response for emergencies that 9-1-1 is designed for. Thus, "universal emergency number" aptly describes its role in public safety and emergency response systems.