1F1

1F1 refers to a range of Unicode code points used to form country flag emoji. Specifically, the Regional Indicator Symbol block spans U+1F1E6 through U+1F1FF. This block contains 26 symbols, each corresponding to a Latin letter A through Z: U+1F1E6 represents A, U+1F1E7 represents B, and so on up to U+1F1FF for Z. The two symbols are used together to encode a country’s ISO 3166-1 alpha-2 code.

In practice, a flag emoji is produced by placing two regional indicator symbols in sequence. The pair forms the flag for the two-letter country code formed by the underlying letters. For example, the United States flag uses the pair U+1F1FA and U+1F1F8 (U and S). When rendering systems support emoji presentation, this sequence appears as the corresponding national flag. If a system does not support the emoji flag rendering, the two indicators may display as separate letters or as generic placeholders.

Rendering behavior can vary by platform, font, and software version. Some environments may disable color emoji, display monochrome glyphs, or fall back to text representations rather than graphical flags. The concept of 1F1 thus functions as a technical mechanism within Unicode to encode flag-like symbols, relying on the pairing of two regional indicators to convey a country code rather than a standalone character.