ESN Glossary Definition

Electronic Serial Number: The electronic serial numbers are used in devices using code division multiple access (CDMA) technology. A 32-bit ESN has 8 bits representing a manufacturer code, 18 bits for a unique serial number and 6 bits reserved for future applications. The numbers are also used for time attendance and registration tracking.

In enterprise and customer-service systems, this term helps business and technical teams describe configured processes, transactions, customer interactions, service workflows, or platform behavior. It is relevant when implementing, documenting, supporting, or improving operational systems.