Red circle with white horizontal bar emoji, the no entry or do not enter traffic sign, meaning forbidden or prohibited.
256 characters in the Miscellaneous Symbols Unicode block, from number 213.
U+26D4NO ENTRYU+26D5ALTERNATE ONE-WAY LEFT WAY TRAFFICU+26D6BLACK TWO-WAY LEFT WAY TRAFFICU+26D7WHITE TWO-WAY LEFT WAY TRAFFICU+26D8BLACK LEFT LANE MERGEU+26D9WHITE LEFT LANE MERGEU+26DADRIVE SLOW SIGNU+26DBHEAVY WHITE DOWN-POINTING TRIANGLEU+26DCLEFT CLOSED ENTRYU+26DDSQUARED SALTIREU+26DEFALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUAREU+26DFBLACK TRUCKU+26E0RESTRICTED LEFT ENTRY-1U+26E1RESTRICTED LEFT ENTRY-2U+26E2ASTRONOMICAL SYMBOL FOR URANUSU+26E3HEAVY CIRCLE WITH STROKE AND TWO DOTS ABOVEU+26E4PENTAGRAMU+26E5RIGHT-HANDED INTERLACED PENTAGRAMU+26E6LEFT-HANDED INTERLACED PENTAGRAMU+26E7INVERTED PENTAGRAMU+26E8BLACK CROSS ON SHIELDU+26E9SHINTO SHRINEU+26EACHURCHU+26EBCASTLEU+26ECHISTORIC SITEU+26EDGEAR WITHOUT HUBU+26EEGEAR WITH HANDLESU+26EFMAP SYMBOL FOR LIGHTHOUSEU+26F0MOUNTAINU+26F1UMBRELLA ON GROUNDU+26F2FOUNTAINU+26F3FLAG IN HOLEU+26F4FERRYU+26F5SAILBOATU+26F6SQUARE FOUR CORNERSU+26F7SKIERU+26F8ICE SKATEU+26F9PERSON WITH BALLU+26FATENTU+26FBJAPANESE BANK SYMBOLU+26FCHEADSTONE GRAVEYARD SYMBOLU+26FDFUEL PUMPU+26FECUP ON BLACK SQUAREU+26FFWHITE FLAG WITH HORIZONTAL MIDDLE BLACK STRIPE