According to my look for, the final HDB hotline is 1800-225-5432 . It's a Branch Office environment Provider Line that operates on weekdays from 8:00 AM to 5:00 PM. On top of that, you can find other Call quantities for unique services: * HDB Main Line: 6490-1111 (for common enquiries, https://finnyodmz.newsbloger.com/37875389/hdb-town-council-hotline-210-22