Determined by my lookup, the general HDB hotline is 1800-225-5432 . It is a Department Office Company Line that operates on weekdays from 8:00 AM to 5:00 PM.On top of that, there are other Call figures for specific products and services:* HDB Key Line: 6490-1111 (for basic enquiries, weekdays eight:30 AM - five:00 PM)* Essential Servicing Servi