 These translations have since been deprecated.An Individual Address Block (IAB) is an inactive registry activity which has been replaced by the MA-S (MA-S was previously named OUI-36 and have no overlaps in addresses with IAB) registry product as of January 1, 2014.The IAB uses an OUI from MA-L (MA-L (MAC address block large) registry was previously named OUI registry, the term OUI is still in use, but not for calling a registry) belonging to the IEEE Registration Authority, concatenated with 12 additional IEEE-provided bits (for a total of 36 bits), leaving only 12 bits for the IAB owner to assign to their (up to 4096) individual devices.