Based upon my research, the final HDB hotline is 1800-225-5432 . It is a Branch Business office Assistance Line that operates on weekdays from eight:00 AM to five:00 PM.On top of that, you will find other Make contact with figures for certain companies:* HDB Major Line: 6490-1111 (for standard enquiries, weekdays eight:30 AM - 5:00 PM)* Importa