Determined by my search, the overall HDB hotline is 1800-225-5432 . This is a Branch Workplace Support Line that operates on weekdays from eight:00 AM to 5:00 PM. Furthermore, you can find other Speak to numbers for specific products and services: * HDB Key Line: 6490-1111 (for normal enquiries, weekdays https://hdbtowncouncilhotline210201009.dreamyblogs.com/37577119/hdb-town-council-hotline-210-22