The Tangsa or Tangshang in India and Myanmar (Burma) respectively, is a tribe native to Changlang District of Arunachal Pradesh, parts of Tinsukia District of Assam, in north-eastern India, and across the border in Sagaing Region, parts of Kachin State, Myanmar (Burma). The Tangshang in Myanmar were formerly known as Rangpang, Pangmi, and Heimi/Haimi. Tangshang/Tangsa is the largest Naga sub-tribe having an approximate population of 450,000 (India and Myanmar). Their language is called Naga-Tase in the Ethnologue and Tase Naga in the ISO code (ISO639-3:nst). They are a scheduled group under the Indian Constitution (where they are listed under 'other Naga tribes') and there are many sub-groups within Tangsa on both sides of the border.