According to my search, the general HDB hotline is 1800-225-5432 . This is a Branch Business office Assistance Line that operates on weekdays from eight:00 AM to five:00 PM. Also, there are other contact numbers for specific services: * HDB Primary Line: 6490-1111 (for common enquiries, weekdays eight:thirty AM - https://hdbtowncouncilhotline210278877.thenerdsblog.com/43079854/hdb-town-council-hotline-210-22