macadress

CG Power Systems Ireland Limited

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:12:76:00:00:00 /24
Vendor addressHerbert House., Harmony Row, Dublin IE D2
Country🇮🇪  Ireland
RegisteredSep 29, 2004
Block range00:12:76:00:00:00– 00:12:76: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. Sep 29, 2004 – Feb 1, 2011 Microsol Holdings Ltd. name changedaddress changed
  2. Feb 1, 2011 – present CG Power Systems Ireland Limited

Example addresses in this block

00:12:76:00:00:00 00:12:76:7F:FF:FF 00:12:76:FF:FF:FF

Where this block sits

Previous 00:12:75:00:00:00 /24 Sentilla Corporation Next 00:12:77:00:00:00 /24 Beijer Electronics Corp.

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

CG Power Systems Ireland Limited holds 1 registered blocks in the IEEE registry, ranking #8,128 of 33,421 organizations by block count.