MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:05:42:00:00:00 /24
Vendor address4-33-3 Kokuryo-cho, JP
Country🇯🇵 Japan
RegisteredFeb 2, 2001
Block range00:05:42:00:00:00– 00:05:42: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
Previous
00:05:41:00:00:00 /24
Advanced Systems Co., Ltd.
Next
00:05:43:00:00:00 /24
IQ Wireless GmbH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Otari, Inc. holds 1 registered blocks in the IEEE registry, ranking #22,371 of 33,421 organizations by block count.