Undefined Character (U+16EFF)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𖻿` `𖻿`
UTF-8 Encoding:	`0xF0 0x96 0xBB 0xBF`
UTF-16 Encoding:	`0xD81B 0xDEFF`
UTF-32 Encoding:	`0x00016EFF`

References