calling card

noun

1. Also called card, visiting card. a small card with the name and often the address of a person or of a couple, for presenting when making a business or social call, for enclosing in gifts, etc.
2. Informal. any mark, sign, trace, characteristic, or the like by which someone or something can be recognized.
3. Also called phone card. a prepaid card or charge card that can be used to make a telephone call at home or away from home.

noun

1. a small card bearing the name and usually the address of a person, esp for giving to business or social acquaintancesAlso called: visiting card