MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixD0:12:42:00:00:00 /24
Vendor address2-43-15 Tomigaya Shibuya-ku TOKYO JP 151-0063
Country🇯🇵 Japan
RegisteredJun 11, 2014
Block rangeD0:12:42:00:00:00– D0:12:42: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
BIOS Corporation holds 1 registered blocks in the IEEE registry, ranking #6,998 of 33,421 organizations by block count.