ISO 3166-2:TV is the entry for Tuvalu in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Currently for Tuvalu, ISO 3166-2 codes are defined for 1 town council and 7 island councils. Niulakita, which now has its own island council, is not listed.
Each code consists of two parts, separated by a hyphen. The first part is TV, the ISO 3166-1 alpha-2 code of Tuvalu. The second part is three letters.
Read more about ISO 3166-2:TV: Current Codes, Changes