macadress

ISA CO., LTD.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:A0:66:00:00:00 /24
Vendor addressSHINJUKU LAMBDAX BLDG. 5F., JP
Country🇯🇵  Japan
RegisteredApr 22, 1998
Block range00:A0:66:00:00:00– 00:A0:66: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

00:A0:66:00:00:00 00:A0:66:7F:FF:FF 00:A0:66:FF:FF:FF

Where this block sits

Previous 00:A0:65:00:00:00 /24 Symantec Corporation Next 00:A0:67:00:00:00 /24 NETWORK SERVICES GROUP

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

ISA CO., LTD. holds 1 registered blocks in the IEEE registry, ranking #16,734 of 33,427 organizations by block count.