Depending on my lookup, the overall HDB hotline is 1800-225-5432 . It's really a Department Workplace Provider Line that operates on weekdays from 8:00 AM to 5:00 PM. Moreover, there are actually other contact numbers for particular solutions: * HDB Principal Line: 6490-1111 (for basic enquiries, weekdays 8:30 AM - https://hdb-town-council-hotline66554.shoutmyblog.com/36188001/hdb-town-council-hotline-210-22