The United Nations records Indonesia's date of admission as 28-09-1950, after India and the Philippines
Background
The United Nations list of member states records Indonesia's date of admission as 28-09-1950.
The same list records 30-10-1945 for India and 24-10-1945 for the Philippines.
Thailand's date of admission is given as 15-12-1946.
Malaysia's date of admission is given as 17-09-1957 and Singapore's as 21-09-1965.
Indonesia therefore entered the United Nations after India, the Philippines and Thailand, but before Malaysia and Singapore.
Indonesia is at present one of the 193 member states of the United Nations.
In plain words
Date of admission Date of admission to the United Nations — The day a state formally became a United Nations member.