Based on my search, the general HDB hotline is 1800-225-5432 . This is a Branch Office environment Service Line that operates on weekdays from 8:00 AM to five:00 PM.In addition, you'll find other Speak to figures for distinct expert services:* HDB Most important Line: 6490-1111 (for typical enquiries, weekdays eight:thirty AM - five:00 PM)* Vit