Who owns MAC prefix E40439?

E40439 is registered to TomTom Software Ltd in the IEEE MA-L registry.

What devices use E40439?

Any network device with a MAC address starting E4:04:39 was manufactured by or for TomTom Software Ltd.

MA-L · OUI prefix

TomTom Software Ltd

Any MAC address starting E4:04:39 is registered to TomTom Software Ltd.

OUI prefix	E40439
Vendor	TomTom Software Ltd
Registry	MA-L (24-bit, large block)
Example MAC	E4:04:39:00:00:00

What this means

The IEEE assigned the MA-L block E40439 to TomTom Software Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting E4:04:39, it is TomTom Software Ltd hardware.

Look up another MAC