MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:05:87:00:00:00 /24
Vendor address5540 Research Park Drive Madison WI US 53711
Country🇺🇸 United States
RegisteredApr 17, 2001
Block range00:05:87:00:00:00– 00:05:87:FF:FF:FF
Address capacity16,777,216
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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Locus, Incorporated holds 1 registered blocks in the IEEE registry, ranking #18,709 of 33,427 organizations by block count.