macadress

PEZY Computing K.K.

MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix38:B8:EB:B0:00:00 /28
Vendor address5F Chiyodaogawamachi Crosta, 1-11 Kanda Ogawamachi Chiyoda-ku Tokyo JP 101-0052
Country🇯🇵  Japan
RegisteredNov 29, 2015
Block range38:B8:EB:B0:00:00– 38:B8:EB:BF:FF:FF
Address capacity1,048,576
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. Nov 29, 2015 – May 17, 2023 ExaScaler Inc. name changedaddress changed
  2. May 17, 2023 – present PEZY Computing K.K.

Example addresses in this block

38:B8:EB:B0:00:00 38:B8:EB:B7:FF:FF 38:B8:EB:BF:FF:FF

Where this block sits

Previous 38:B8:EB:A0:00:00 /28 SECAD SA Next 38:B8:EB:C0:00:00 /28 Ajax Systems Inc

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

PEZY Computing K.K. holds 1 registered blocks in the IEEE registry, ranking #22,864 of 33,427 organizations by block count.