Is that correct, the 46 residents of Pitcairn Island control a TLD just for their own use?
Sort of. But the 46 residents don’t really control it, the UK does as per the CIA Factbook: “Pitcairn Island was discovered in 1767 by the British and settled in 1790 by the Bounty mutineers and their Tahitian companions. Pitcairn was the first Pacific island to become a British colony (in 1838) and today remains the last vestige of that empire in the South Pacific.