Dependant on 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. In addition, you'll find other Make contact with figures for certain providers: * HDB Major Line: 6490-1111 (for standard enquiries, weekdays 8:30 https://yurin531oyi1.wikilowdown.com/user