macadress

Krohne

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1D:44:00:00:00 /24
Vendor addressLudwig-Krohne-Str. 5 Duisburg DE 47058
Country🇩🇪  Germany
RegisteredAug 18, 2007
Block range00:1D:44:00:00:00– 00:1D:44: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. Aug 18, 2007 – Jan 14, 2014 Krohne name changedaddress changedcountry changed
  2. Jan 14, 2014 – Jan 15, 2014 Krohne Messtechnk GmbH name changed
  3. Jan 15, 2014 – Jul 22, 2014 KROHNE name changed
  4. Jul 22, 2014 – Dec 2, 2016 KROHNE Messtechnik GmbH name changedaddress changedcountry changed
  5. Dec 2, 2016 – present Krohne

Example addresses in this block

00:1D:44:00:00:00 00:1D:44:7F:FF:FF 00:1D:44:FF:FF:FF

Where this block sits

Previous 00:1D:43:00:00:00 /24 Shenzhen G-link Digital Technology Co., Ltd. Next 00:1D:45:00:00:00 /24 Cisco Systems, Inc

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

Krohne holds 1 registered blocks in the IEEE registry, ranking #17,928 of 33,421 organizations by block count.