Undefined Character (U+243F)

Block:	Control Pictures, U+2400 - U+243F^[1]
Plane:	Basic Multilingual Plane, U+0000 - U+FFFF^[1]
HTML Entity:	`␿` `␿`
UTF-8 Encoding:	`0xE2 0x90 0xBF`
UTF-16 Encoding:	`0x243F`
UTF-32 Encoding:	`0x0000243F`

References