What is a MA-L, MA-M, MA-S assignment? | FAQ | MAC Address Vendor Lookup
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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
What is a MA-L, MA-M, MA-S assignment?


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