The flag for Tonga, which may show as the letters TO on some platforms.
The Flag: Tonga emoji is a flag sequence combining ? Regional Indicator Symbol Letter T and ? Regional Indicator Symbol Letter O. These display as a single emoji on supported platforms.
Flag: Tonga was added to Emoji 1.0 in 2015.
U+1F1F9
U+1F1F4
?? Regional indicator symbol letter t
?? Regional indicator symbol letter o