IBM

IBM accessible at www.ibm.com, manages 7 unique MAC address prefixes. These prefixes are part of a massive allocation with a total block size of 70.3 million addresses.

The allocation includes the following types: MA-L (Mac Address Block Large, ~16 million addresses each), and MA-M (Mac Address Block Medium, ~1 Million addresses each).

The company registered its MAC address allocation on 07 October 2011, and the most recent update was made on 25 July 2024. These allocations support network identification and communication globally.

Unique prefixes: 7

Block Size: 70254585 (70.25 M)

www.ibm.com

First registration: 07 October 2011

Last updated: 25 July 2024

Types

MA-L:Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)

MA-M:Mac Address Block Medium. Number of address 2^20 (~1 Million)

MAC PrefixTypeRegistration Date
2C:69:1D:8 MA-M2022-05-20
34:40:B5 MA-L2011-10-07
40:F2:E9 MA-L2012-10-05
90:4E:91:7 MA-M2017-07-23
98:BE:94 MA-L2014-02-25
A8:97:DC MA-L2013-05-02
C4:FF:84:8 MA-M2024-07-25