What is IMEI Number?
The IMEI (International Mobile Equipment Identity) is a standard maintained by the GSMA (GSM Association) that assigns a globally unique 15-digit number to every device that connects to cellular networks. This number is permanently programmed into the device at the factory and cannot be changed through software. Unlike a SIM card, which identifies the subscriber and can be swapped between devices, the IMEI identifies the physical hardware itself. In GPS tracking, the IMEI plays three critical roles: it authenticates the device on the cellular network so it can transmit data, it serves as the unique identifier that links the tracker to your account on the tracking platform, and it allows a device to be reported and blacklisted across networks if stolen. When you activate a new GPS tracker, you provide its IMEI to your tracking platform so the server knows which incoming data stream belongs to which vehicle.
How it works
- A 15-digit code is assigned to every GPS tracker at the factory.
- The first 8 digits (TAC) identify the manufacturer and device model.
- The next 6 digits are a unique serial number for that specific unit.
- The final digit is a check digit calculated using the Luhn algorithm.
- When a SIM card is inserted, the IMEI authenticates the device on the cellular network.
- The IMEI is registered on the tracking platform to link incoming data to the correct vehicle.
Key facts
- Each IMEI is a 15-digit fingerprint unique to a single device worldwide
- The number is permanently burned into the hardware at the factory and cannot be changed via software
- Cellular networks use the IMEI to authenticate the device before allowing data transmission
- Tracking platforms use the IMEI to match incoming data to the correct vehicle or asset
- A stolen tracker can be reported by IMEI to blacklist it across cellular networks
- IMEI is distinct from IMSI (subscriber identity on the SIM) and ICCID (SIM card serial number)
