Tonga Country info Continent - Oceania Tonga capital - Nukuʻalofa Tonga ISO code - TO Tonga ISO3 code - TON Tonga dialing prefix - 676 Next States 'Eua Ha`apai Niuas Tongatapu Vava`u See Also: set alarm for 6 am set alarm for 6 am set timer to 4 minutes days between calculatord4 dice rollertext character counterfree electronic time clockHow many days are in 2026