Dependant on my research, the final 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 will find other Make contact with figures for certain providers: * HDB Major Line: 6490-1111 (for standard enquiries, weekdays https://hdb-town-council-hotline33221.blogrelation.com/43519343/hdb-town-council-hotline-210-22