This code point first appeared in version 3.0 of the Unicode® Standard and belongs to the "Specials" block which goes from 0xFFF9 to 0xFFFD.
You can safely add this character in your html code with the entity: 
You can use the u+FFF9 copy pc button below.
Easy u+FFF9 copy paste:
Unicode meta-data
The following table show specific meta-data that is known about this character.The u+FFF9 name is interlinear annotation anchor emoji.
| field | value |
|---|---|
| Codepoint (hex) | FFF9, uFFF9 |
| Character age | Unicode 3.0 |
| Legacy name (Unicode 1.0) | - |
| Official name (Unicode 15.0) | INTERLINEAR ANNOTATION ANCHOR |
| resolved name | interlinear annotation anchor |
| block | Specials (Specials) |
| common typos | u+FFF9, u+FFF9 |
There are alternative spelling that can be found in the wild for the unicode character FFF9 like u FFF9, (u+FFF9) or u +FFF9. You can also find u-FFF9, u*FFF9, un+FFF9, uFFF9, u=FFF9 or c+FFF9. You can also spell it with u FFF9 unicode, u plus FFF9, uncode FFF9 or unicode + FFF9.
Its bidirectional class is "ON":Other Neutrals (All other characters, including OBJECT REPLACEMENT CHARACTER)
Glyphs and symbols in your browser
The following unicode chart presents different versions of the glyph corresponding to the unicode characters u+FFF9 that are available on your computer.
In order to type this character easily, you may want to download and install a unicode Specials keyboard.
A sample of fonts are used below to display whether the character has a glyph in this font or not.
Encodings (Unicode characters converter)
The following character table converter for +uFFF9 allows you to see the value of the character in different encodings
| encoding | hexadecimal | decimal | binary |
|---|---|---|---|
| UTF-8 | EF BF B9 | 15712185 | 11101111 10111111 10111001 |
| UCS2 | F9 FF | 63999 | 11111001 11111111 |
| UTF-16LE | F9 FF | 63999 | 11111001 11111111 |
| UTF-16BE | FF F9 | 65529 | 11111111 11111001 |
| UTF7 | 2B 2F 2F 6B 2D | 185475230509 | 00101011 00101111 00101111 01101011 00101101 |
| UTF7-IMAP | 26 2C 2C 6B 2D | 163949865773 | 00100110 00101100 00101100 01101011 00101101 |