MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixBC:B1:81:00:00:00 /24
Vendor address22-22,Nagaike-cho, Osaka, JP 545-8522,
Country🇯🇵 Japan
RegisteredSep 24, 2009
Block rangeBC:B1:81:00:00:00– BC:B1:81: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
SHARP Corporation holds 21 registered blocks in the IEEE registry, ranking #170 of 33,421 organizations by block count.
Other blocks registered to SHARP CORPORATION