macadress

WNC Corporation

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1B:B1:00:00:00 /24
Vendor addressNo. 10-1, Li-hsin Road I, Hsinchu Science Park, Hsinchu TW 300
Country🇹🇼  Taiwan
RegisteredMar 7, 2007
Block range00:1B:B1:00:00:00– 00:1B: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 →

Ownership timeline

  1. Mar 7, 2007 – Apr 5, 2016 Wistron Neweb Corp. name changedaddress changed
  2. Apr 5, 2016 – Sep 19, 2025 Wistron Neweb Corporation name changed
  3. Sep 19, 2025 – present WNC Corporation

Example addresses in this block

00:1B:B1:00:00:00 00:1B:B1:7F:FF:FF 00:1B:B1:FF:FF:FF

Where this block sits

Previous 00:1B:B0:00:00:00 /24 Bharat Electronics Limited Next 00:1B:B2:00:00:00 /24 Intellect International NV

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

WNC Corporation holds 51 registered blocks in the IEEE registry, ranking #71 of 33,427 organizations by block count.

Other blocks registered to WNC Corporation

00:0B:6B:00:00:00 /24 MA-L 04:B3:C9:00:00:00 /24 MA-L 10:E8:A7:00:00:00 /24 MA-L 1C:D6:BE:00:00:00 /24 MA-L 20:58:43:00:00:00 /24 MA-L 24:41:FE:00:00:00 /24 MA-L 28:04:7A:00:00:00 /24 MA-L 28:24:FF:00:00:00 /24 MA-L 28:2E:89:00:00:00 /24 MA-L 2C:9F:FB:00:00:00 /24 MA-L 2C:DC:AD:00:00:00 /24 MA-L 30:14:4A:00:00:00 /24 MA-L