Who owns MAC prefix 5421A9?

5421A9 is registered to ITEL MOBILE LIMITED in the IEEE MA-L registry.

What devices use 5421A9?

Any network device with a MAC address starting 54:21:A9 was manufactured by or for ITEL MOBILE LIMITED.

MA-L · OUI prefix

ITEL MOBILE LIMITED

Any MAC address starting 54:21:A9 is registered to ITEL MOBILE LIMITED in HK.

OUI prefix	5421A9
Vendor	ITEL MOBILE LIMITED
Registry	MA-L (24-bit, large block)
Country	HK
Example MAC	54:21:A9:00:00:00

What this means

The IEEE assigned the MA-L block 5421A9 to ITEL MOBILE 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 54:21:A9, it is ITEL MOBILE LIMITED hardware.

Other ITEL MOBILE LIMITED prefixes

ITEL MOBILE LIMITED holds 66 registered blocks in total.

00C711 04B5C1 04D320 0C8BD3 18AC9E 1C4C48 204569 20D276 24F306 282A87 3C3576 3C3B99 all 66 »

Look up another MAC