4423 Full Form. Full Meaning of 4423 Find long form and abbreviation, slang or definition of 4423. What does 4423 mean? What does 4423 stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.