Javanese Digit Zero
HTML Entity Browser Test:

U+A9D0 is the Unicode hex value of the character Javanese Digit Zero, which is categorized as "decimal digit number" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+A9D0
Character Name JAVANESE DIGIT ZERO
General Category Decimal Digit Number [Code: Nd]
Canonical Combining Class 0
Bidirectional Category L
Mirrored N
Unicode Character Encodings
Javanese Digit Zero HTML Entity ꧐ (decimal entity), ꧐ (hex entity)
Windows Key Code Alt 43472 or Alt +A9D01
Programming Source Code Encodings Python hex: u"\uA9D0", Hex for C++ and Java: "\uA9D0"
UTF-8 Hexadecimal Encoding 0xEAA790
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 43472) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +A9D0) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Javanese Digit Zero character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.