macadress

APRESIA Systems Ltd

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:40:66:00:00:00 /24
Vendor addressTsukuba Network Technical Center, Kidamari 3550 Tsuchiura-shi Ibaraki-ken JP 300-0026
Country🇯🇵  Japan
RegisteredApr 22, 1998
Block range00:40:66:00:00:00– 00:40:66: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 →

Ownership timeline

  1. Apr 22, 1998 – Dec 14, 2013 HITACHI CABLE, LTD. name changedaddress changed
  2. Dec 14, 2013 – Dec 17, 2013 Hitachi Metals, Ltd name changed
  3. Dec 17, 2013 – Jan 5, 2017 Hitachi Metals, Ltd. name changedaddress changed
  4. Jan 5, 2017 – present APRESIA Systems Ltd

Example addresses in this block

00:40:66:00:00:00 00:40:66:7F:FF:FF 00:40:66:FF:FF:FF

Where this block sits

Previous 00:40:65:00:00:00 /24 GTE SPACENET Next 00:40:67:00:00:00 /24 OMNIBYTE CORPORATION

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

APRESIA Systems Ltd holds 2 registered blocks in the IEEE registry, ranking #1,521 of 33,421 organizations by block count.