Depending on my lookup, 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. Additionally, you will find other Get in touch with numbers for particular solutions: * HDB Primary Line: 6490-1111 (for common enquiries, weekdays https://hdbtowncouncilhotline210233322.pointblog.net/hdb-town-council-hotline-210-22-83919777