Based on my search, the general 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. Also, there are actually other contact numbers for specific services: * HDB Main Line: 6490-1111 (for general enquiries, weekdays eight:thirty AM - https://dennisg318hsc9.worldblogged.com/profile