MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix90:4E:91:70:00:00 /28
Vendor address9000 south rita rd Tucson AZ US 85744
Country🇺🇸 United States
RegisteredJun 4, 2017
Block range90:4E:91:70:00:00– 90:4E:91:7F:FF:FF
Address capacity1,048,576
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority
Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.
Curious how a prefix like this turns into a full address? See how MAC addresses are structured →
Example addresses in this block
Where this block sits
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90:4E:91:60:00:00 /28
Nuwa Robotics (HK) Limited Taiwan Branch
Next
90:4E:91:80:00:00 /28
CommandScape, Inc.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
IBM holds 7 registered blocks in the IEEE registry, ranking #427 of 33,427 organizations by block count.
Other blocks registered to IBM