macadress

Tsubata Engineering Co.,Ltd. (Head Office)

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1B:36:00:00:00 /24
Vendor addressKoyanagi 1-2 Ibaraki Osaka JP 567-0852
Country🇯🇵  Japan
RegisteredJan 26, 2007
Block range00:1B:36:00:00:00– 00:1B:36: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. Jan 26, 2007 – Feb 9, 2007 Tsubata Engineering Co.,Ltd. name changedaddress changed
  2. Feb 9, 2007 – present Tsubata Engineering Co.,Ltd. (Head Office)

Example addresses in this block

00:1B:36:00:00:00 00:1B:36:7F:FF:FF 00:1B:36:FF:FF:FF

Where this block sits

Previous 00:1B:35:00:00:00 /24 ChongQing JINOU Science & Technology Development CO.,Ltd Next 00:1B:37:00:00:00 /24 Computec Oy

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

Tsubata Engineering Co.,Ltd. (Head Office) holds 1 registered blocks in the IEEE registry, ranking #30,631 of 33,421 organizations by block count.