MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixD4:94:5A:00:00:00 /24
Vendor address1-12, Higashi-Gotanda 2-chome Shinagawa-ku Tokyo JP 141-0022
Country🇯🇵 Japan
RegisteredJan 19, 2011
Block rangeD4:94:5A:00:00:00– D4:94:5A: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
COSMO CO., LTD holds 2 registered blocks in the IEEE registry, ranking #1,798 of 33,427 organizations by block count.