🇹🇴Tonga (officially: Kingdom of Tonga) is filed in ISO 3166-1 under alpha-2 code TO, alpha-3 code TON and numeric code 776. Its international dialing code is +676 and its country-code top-level domain is .to. The capital is Nuku'alofa. Region: Oceania.
Currency: TOP (Pa’anga).
The two-letter code appears in domains, locales (like en-TO), shipping and licence plates; the three-letter code in passports, finance and sport; the numeric code where Latin script is unavailable.