Cyrillic Capital Letter Dzze
HTML Entity Browser Test:

U+A688 is the Unicode hex value of the character Cyrillic Capital Letter Dzze, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+A688
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Mirrored N
Lowercase Version U+A689
Unicode Character Encodings
Cyrillic Capital Letter Dzze HTML Entity Ꚉ (decimal entity), Ꚉ (hex entity)
Windows Key Code Alt 42632 or Alt +A6881
Programming Source Code Encodings Python hex: u"\uA688", Hex for C++ and Java: "\uA688"
UTF-8 Hexadecimal Encoding 0xEA9A88
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 42632) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +A688) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Cyrillic Capital Letter Dzze character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.