According to my search, the overall HDB hotline is 1800-225-5432 . It is just a Department Workplace Support Line that operates on weekdays from 8:00 AM to 5:00 PM. Also, there are other Get in touch with numbers for certain companies: * HDB Major Line: 6490-1111 (for normal enquiries, weekdays https://hdbtowncouncilhotline210223221.liberty-blog.com/37314421/hdb-town-council-hotline-210-22