Who owns MAC prefix 901A4F?

901A4F is registered to EM Microelectronic in the IEEE MA-L registry.

What devices use 901A4F?

Any network device with a MAC address starting 90:1A:4F was manufactured by or for EM Microelectronic.

MA-L · OUI prefix

EM Microelectronic

Any MAC address starting 90:1A:4F is registered to EM Microelectronic in CH.

OUI prefix	901A4F
Vendor	EM Microelectronic
Registry	MA-L (24-bit, large block)
Country	CH
Example MAC	90:1A:4F:00:00:00

What this means

The IEEE assigned the MA-L block 901A4F to EM Microelectronic. 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 90:1A:4F, it is EM Microelectronic hardware.

Other EM Microelectronic prefixes

EM Microelectronic holds 72 registered blocks in total.

08736F 08CE94 0CF3EE 109D9C 183219 2CABEE 406918 444520 28E971 2CDCC1 345B98 4438F3 all 72 »

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