Determined by my research, the final HDB hotline is 1800-225-5432 . It's really a Department Office Provider Line that operates on weekdays from 8:00 AM to 5:00 PM. Furthermore, you can find other Call quantities for precise products and services: * HDB Most important Line: 6490-1111 (for general enquiries, weekdays https://ralphx986alv6.wikifrontier.com/user