Arrow7 Corporation
MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:19:B1:00:00:00 /24
Vendor addressKamijima 3-27-7 Hamamatsu Shizuoka JP 433-8122
Country🇯🇵 Japan
Block range00:19:B1:00:00:00– 00:19:B1: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