Who owns MAC prefix 0040DA?

0040DA is registered to TELSPEC LTD in the IEEE MA-L registry.

What devices use 0040DA?

Any network device with a MAC address starting 00:40:DA was manufactured by or for TELSPEC LTD.

MA-L · OUI prefix

TELSPEC LTD

Any MAC address starting 00:40:DA is registered to TELSPEC LTD in GB.

OUI prefix	0040DA
Vendor	TELSPEC LTD
Registry	MA-L (24-bit, large block)
Country	GB
Example MAC	00:40:DA:00:00:00

What this means

The IEEE assigned the MA-L block 0040DA to TELSPEC 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 00:40:DA, it is TELSPEC LTD hardware.

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