MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixD4:7B:75:00:00:00 /24
Vendor addressMarienwerderstraße. 3 Espelkamp North Rhine Westphalia DE 32339
RegisteredJan 14, 2011
Block rangeD4:7B:75:00:00:00– D4:7B:75: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 14, 2011 – Mar 27, 2013 HARTING Electronics GmbH & Co. KG name changed
  2. Mar 27, 2013 – present HARTING Electronics GmbH

Example addresses in this block

Where this block sits

HARTING Electronics GmbH holds 3 registered blocks in the IEEE registry, ranking #1,085 of 33,427 organizations by block count.

Other blocks registered to HARTING Electronics GmbH