MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:C0:9C:00:00:00 /24
Vendor address81 Koizumi, Ueda, Nagano Tokyo JP 386-1192
Country🇯🇵 Japan
RegisteredApr 22, 1998
Block range00:C0:9C:00:00:00– 00:C0:9C: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 →
Ownership timeline
- Apr 22, 1998 – Jun 16, 2007 TOA ELECTRONIC LTD. name changedaddress changed
- Jun 16, 2007 – present HIOKI E.E. CORPORATION
Example addresses in this block
Where this block sits
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00:C0:9B:00:00:00 /24
Tellabs Enterprise, Inc.
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00:C0:9D:00:00:00 /24
DISTRIBUTED SYSTEMS INT'L, INC
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
HIOKI E.E. CORPORATION holds 2 registered blocks in the IEEE registry, ranking #2,199 of 33,427 organizations by block count.
Other blocks registered to HIOKI E.E. CORPORATION