Who owns MAC prefix 001266?

001266 is registered to Swisscom Hospitality Services SA in the IEEE MA-L registry.

What devices use 001266?

Any network device with a MAC address starting 00:12:66 was manufactured by or for Swisscom Hospitality Services SA.

MA-L · OUI prefix

Swisscom Hospitality Services SA

Any MAC address starting 00:12:66 is registered to Swisscom Hospitality Services SA in CH.

OUI prefix	001266
Vendor	Swisscom Hospitality Services SA
Registry	MA-L (24-bit, large block)
Country	CH
Example MAC	00:12:66:00:00:00

What this means

The IEEE assigned the MA-L block 001266 to Swisscom Hospitality Services SA. 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 00:12:66, it is Swisscom Hospitality Services SA hardware.

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