"Dost number" can be replaced by several words that convey the same meaning. A casual or slang synonym for "dost number" is "buddy's phone number," "pal's contact," or "mate's digits." However, to describe this term formally, it can be replaced with "friend's phone number," "colleague's contact information," or "acquaintance's digits." Another synonymous term for "dost number" is "companion's digits," "ally's phone number," or "partner's contact information." In essence, "dost number" generally refers to a person's phone number or contact information, primarily associated with a friend or acquaintance. Thus, it can be substituted with a variety of words or phrases to express the same idea.