Based upon my research, the overall HDB hotline is 1800-225-5432 . It's really a Department Office Services Line that operates on weekdays from 8:00 AM to 5:00 PM. Additionally, you'll find other Speak to figures for distinct companies: * HDB Key Line: 6490-1111 (for normal enquiries, weekdays eight:30 AM - https://hdbtowncouncilhotline210223211.digitollblog.com/36989308/hdb-town-council-hotline-210-22