The Number 811: Properties and Meanings811 is a Prime Number.
811 is a Centered 18-gonal Number.
811 Nauheima is a minor planet orbiting the Sun. It was named after Bad Nauheim, a spa town in western Germany.
811 Naval Air Squadron is a squadron of Britain's Fleet Air Arm.
In the North American Numbering Plan, particularly in Canada and the U.S., the telephone number 811 has traditionally been a direct line to the business office of the telephone company providing service on the line.
The Year 811 ADIn the year 811 AD...Emperor Basil I of the Byzantine Empire, was born.