The flag for Ascension Island, which may show as the letters AC on some platforms. Apple devices show the St. Helena flag for both Ascension Island and Tristan Da Cunha.
The Flag: Ascension Island emoji is a flag sequence combining ? Regional Indicator Symbol Letter A and ? Regional Indicator Symbol Letter C. These display as a single emoji on supported platforms.
Flag: Ascension Island was added to Emoji 1.0 in 2015.
U+1F1E6
U+1F1E8
?? Regional indicator symbol letter a
?? Regional indicator symbol letter c