What devices use 5491AF7?

Any network device with a MAC address starting 54:91:AF:7 was manufactured by or for Hong Telecom Equipment Service Limited.

MA-M · OUI prefix

Hong Telecom Equipment Service Limited

Q: Who owns MAC prefix 5491AF7?

5491AF7 is registered to Hong Telecom Equipment Service Limited in the IEEE MA-M registry.

Any MAC address starting 54:91:AF:7 is registered to Hong Telecom Equipment Service Limited in CN.

OUI prefix	5491AF7
Vendor	Hong Telecom Equipment Service Limited
Registry	MA-M (28-bit, medium block)
Country	CN
Example MAC	54:91:AF:7:00:00:00

What this means

The IEEE assigned the MA-M block 5491AF7 to Hong Telecom Equipment Service Limited. 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 54:91:AF:7, it is Hong Telecom Equipment Service Limited hardware.

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