Area code 811 is not a geographic area code but rather a service code in the United States and Canada designated for “Call Before You Dig” services. It connects callers with local utility companies to mark underground lines before excavation projects begin. This federally mandated service is aimed at preventing damage to underground infrastructure such as gas, water, electric, and telecom lines. Dialing 811 is required by law in many jurisdictions before starting projects like fencing, planting trees, or building decks. Though not used for personal or business phone lines, 811 is a vital public safety tool that supports contractors, homeowners, and utility providers alike. It ensures safety, avoids costly repairs, and helps prevent service outages or injuries. Educational campaigns about 811 are often run by state and local governments, and utility companies may co-brand with the number to increase awareness. While it doesn’t function like a traditional area code, 811 remains an important part of the national telecommunications system.