NR — Nauru

Nauru is the world's smallest island nation and third-smallest country by area (21 sq km), a raised coral island in the Central Pacific. Yaren district serves as the de facto capital, though Nauru has no official capital — one of few countries without a designated one. Nauru uses the Australian Dollar. For developers, the NR country code and .nr domain serve this tiny nation. The +674 dialing code covers the entire island. Nauru's lack of an official capital is an interesting edge case for geographic databases — some list Yaren, some list 'none,' and this inconsistency can cause data validation issues. Nauru was once the richest country per capita in the world due to phosphate mining, then one of the most economically challenged when resources were depleted. The .nr domain has limited registrations. Nauru's extreme smallness makes it an edge case for area-based calculations and geographic rendering in mapping applications.