Official contact directory for customs and central GST enabling direct administrative communications with directorates and zonal units. Consolidated official contact directory providing email addresses for Directorate Generals, Directorates and national bodies within Customs and Central GST, paired with designated official emails for direct administrative and operational communication. A separate section lists Zonal Chief Commissioners and Commissionerates across customs zones with official email contacts to facilitate zone level coordination and regulatory correspondence. The document serves as an administrative reference guide and ready reckoner for official communications, not as policy or legal interpretation.