MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix64:33:B5:40:00:00 /28
Vendor address4611 Bee Cave Rd Suite 200 austin TX US 78746
Country🇺🇸 United States
RegisteredJun 13, 2021
Block range64:33:B5:40:00:00– 64:33:B5:4F: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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64:33:B5:30:00:00 /28
Wingtech Mobile Communications Co.,Ltd
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64:33:B5:50:00:00 /28
Revo Smart Technologies co.,limited
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Eagle Eye Networks, Inc holds 1 registered blocks in the IEEE registry, ranking #11,050 of 33,427 organizations by block count.