Who owns MAC prefix A4218A?

A4218A is registered to Nortel Networks in the IEEE MA-L registry.

What devices use A4218A?

Any network device with a MAC address starting A4:21:8A was manufactured by or for Nortel Networks.

MA-L · OUI prefix

Nortel Networks

Any MAC address starting A4:21:8A is registered to Nortel Networks in MX.

OUI prefix	A4218A
Vendor	Nortel Networks
Registry	MA-L (24-bit, large block)
Country	MX
Example MAC	A4:21:8A:00:00:00

What this means

The IEEE assigned the MA-L block A4218A to Nortel Networks. 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 A4:21:8A, it is Nortel Networks hardware.

Other Nortel Networks prefixes

Nortel Networks holds 68 registered blocks in total.

00025F 00034B 0004DC 000CF7 000CF8 000E40 000E62 000075 000181 000342 000438 000997 all 68 »

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