Nuku'alofa — Tonga
Nuevo Laredo [US Consulate] — Mexico
Nuuk (Godthab) — Greenland
Nyasaland — Malawi
O
Oahu — United States
Ocean Island (Banaba) — Kiribati
Ocean Island (Kure Island) — United States
Ogaden — Ethiopia; Somalia
Oil Islands (Chagos Archipelago) — British Indian Ocean Territory