MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:21:D9:00:00:00 /24
Vendor address7-24-14 NERIMA-KU TOKYO JP 178-8686
Country🇯🇵 Japan
RegisteredJun 18, 2008
Block range00:21:D9:00:00:00– 00:21:D9: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
00:21:D8:00:00:00 /24
Cisco Systems, Inc
Next
00:21:DA:00:00:00 /24
Automation Products Group Inc.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
SEKONIC CORPORATION holds 1 registered blocks in the IEEE registry, ranking #25,582 of 33,427 organizations by block count.