nameplate

noun

1. a flat, usually rectangular piece of metal, wood, or plastic on which the name of a person, company, etc., is printed or engraved: She has a large office with her nameplate on the door.
2. masthead(def 2).

noun

1. a small panel on or next to the door of a room or building, bearing the occupant’s name and profession

n.1882, from name (n.) + plate (n.).