Frequently asked questions

What is a MA-L, MA-M, MA-S assignment?

There are currently 3 different size blocks of MAC Addresses available. All three could be used to generate universally administered MAC‌-48 and MAC‌-64.

Name	Full name	Previously named	Number of Addresses
MA-L	MAC Address Block Large	OUI (Organizationally Unique Identifier)	2²⁴ ~= 16 Million
MA-M	MAC Address Block Medium	-	2²⁰ ~= 1 Million
MA-S	MAC Address Block Small	OUI-36 (encompasses IAB Assignments)	2¹² ~= 4,096

References:

IEEE: Finding the right MAC address for your business

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What is a MA-L, MA-M, MA-S assignment?

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