imei
The International Mobile Equipment Identity (IMEI) is a unique identifier assigned to mobile devices that connect to cellular networks. It is used by network operators, manufacturers, and authorities to identify valid devices, prevent theft, and manage access to networks.
The standard IMEI number is 15 digits long. It consists of a Type Allocation Code (TAC) of
IMEI numbers are allocated by manufacturers and registered in global databases maintained by the GSMA and
IMEI Software Version (IMEISV) adds two digits to indicate the device’s software version, producing a 16-digit
Because the IMEI is a persistent device identifier, it is treated as sensitive information in many jurisdictions.
Related identifiers include the MEID, used in certain CDMA networks.