macadress

Eaton Automation AG

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:05:4B:00:00:00 /24
Vendor addressSpinnereistrasse 8 St.Gallen CH 9008
Country🇨🇭  Switzerland
RegisteredFeb 2, 2001
Block range00:05:4B:00:00:00– 00:05:4B: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. Feb 2, 2001 – Aug 14, 2010 Micro Innovation AG name changedaddress changed
  2. Aug 14, 2010 – present Eaton Automation AG

Example addresses in this block

00:05:4B:00:00:00 00:05:4B:7F:FF:FF 00:05:4B:FF:FF:FF

Where this block sits

Previous 00:05:4A:00:00:00 /24 Ario Data Networks, Inc. Next 00:05:4C:00:00:00 /24 RF Innovations Pty Ltd

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

Eaton Automation AG holds 1 registered blocks in the IEEE registry, ranking #11,093 of 33,421 organizations by block count.