Dependant on my look for, the final HDB hotline is 1800-225-5432 . It's a Branch Business office Assistance Line that operates on weekdays from eight:00 AM to five:00 PM.On top of that, there are other Make contact with figures for certain companies:* HDB Major Line: 6490-1111 (for standard enquiries, weekdays 8:30 AM - 5:00 PM)* Essential Main