Depending on my search, the overall HDB hotline is 1800-225-5432 . It is just a Department Business Services Line that operates on weekdays from 8:00 AM to 5:00 PM. In addition, you'll find other Speak to figures for distinct expert services: * HDB Most important Line: 6490-1111 (for typical enquiries, https://hdbtowncouncilhotline210212221.ltfblog.com/35922141/hdb-town-council-hotline-210-22