Depending on my research, the final HDB hotline is 1800-225-5432 . It's really a Department Business Service Line that operates on weekdays from eight:00 AM to five:00 PM.Also, you will discover other Call quantities for unique expert services:* HDB Major Line: 6490-1111 (for basic enquiries, weekdays 8:30 AM - 5:00 PM)* Essential Routine maint