How to recognise a vendor by multicast MAC address? | FAQ | MAC Address Vendor Lookup
Frequently asked questions
? ? ?

How to recognise a vendor by multicast MAC address?

Although multicast MAC addresses don't usually belong to any vendor, they may be used by the companies who own their unicast neighbors. Typically, such addresses are used for various reserved purposes, within custom protocols or equipment. Change the least significant bit of the most significant octet to 0 in order to get the corresponding unicast OUI - and you will know the vendor. Note that the mechanics described might not work for all the multicast OUIs.

Here is a table of some multicast-unicast OUI twins we discovered:

Multicast OUI Unicast OUI
01:00:5E 00:00:5E
01:00:0C 00:00:0C
01:00:1D 00:00:1D
01:00:3C 00:00:3C
01:00:5E 00:00:5E
01:00:10 00:00:10
01:00:81 00:00:81
01:0E:CF 00:0E:CF
01:1B:19 00:1B:19
01:19:A7 00:19:A7
01:20:25 00:20:25
01:80:24 00:80:24
01:80:C2 00:80:C2
01:DD:00 00:DD:00
01:DD:01 00:DD:01
09:00:0D 08:00:0D
09:00:1E 08:00:1E
09:00:02 08:00:02
09:00:2B 08:00:2B
09:00:4C 08:00:4C
09:00:4E 08:00:4E
09:00:6A 08:00:6A
09:00:07 08:00:07
09:00:7C 08:00:7C
09:00:09 08:00:09
09:00:26 08:00:26
09:00:39 08:00:39
09:00:56 08:00:56
09:00:77 08:00:77
09:00:87 08:00:87
AB:00:04 AA:00:04

Have questions?

We work hard to improve our services for you. As part of that process we welcome your feedback, questions and suggestions. Please let us know your thoughts and feelings, and any way in which you think we can improve our product.

Shoot us an email to or just fill in the contact form.

The data was just refreshed