Based on my look for, the final HDB hotline is 1800-225-5432 . It is a Department Workplace Support Line that operates on weekdays from 8:00 AM to 5:00 PM. In addition, you'll find other Speak to figures for certain companies: * HDB Major Line: 6490-1111 (for standard enquiries, weekdays 8:30 https://miltonf321pdp5.snack-blog.com/profile