Tonga is a Polynesian island country located in the southern Pacific Ocean. It is a small country with a population of about 106,000 people. Tonga is a constitutional monarchy and has a parliamentary system of government. The official language of Tonga is Tongan. Tonga has been a member of the Commonwealth of Nations since 1970. Estonia is a country in Northern Europe. It has a population of about 1.3 million people. Estonia is a parliamentary democracy and the official language of Estonia is Estonian. Estonia has been a member of the European Union since 2004. To call Tonga from Estonia, you will need to dial the country code of Tonga, which is 676, followed by the telephone number.