The two-letter ISO 3166-1 alpha-2 country code for Saint-Barthélemy is BL. This code is used for various administrative and postal purposes to distinguish the island as a French Overseas Collectivity. It is also the designated internet country code top-level domain (ccTLD) for the island, though many local businesses still use .fr or .com. For aviation purposes, you might more commonly see the IATA airport code SBH, which refers to the Gustaf III Airport on the island, famous for its incredibly short runway and dramatic approach over a hilltop. When shipping items or filling out international customs forms, "BL" is the official shorthand used to identify this Caribbean territory in a standardized global format.