Based on my research, the final HDB hotline is 1800-225-5432 . It's really a Department Office Services Line that operates on weekdays from 8:00 AM to five:00 PM. Additionally, you'll find other Speak to figures for distinct companies: * HDB Major Line: 6490-1111 (for standard enquiries, weekdays 8:30 AM - https://mayad320pdq6.wikififfi.com/user