macadress

EMH Energiemesstechnik GmbH

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1F:58:00:00:00 /24
Vendor addressVor dem Hassel 2 Brackel DE 21438
Country🇩🇪  Germany
RegisteredDec 31, 2007
Block range00:1F:58:00:00:00– 00:1F:58: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. Dec 31, 2007 – Mar 30, 2012 EMH Energiemesstechnik GmbH name changedaddress changed
  2. Mar 30, 2012 – Mar 14, 2013 EMH Energiemesstechnik GmbH & co.KG name changedaddress changed
  3. Mar 14, 2013 – present EMH Energiemesstechnik GmbH

Example addresses in this block

00:1F:58:00:00:00 00:1F:58:7F:FF:FF 00:1F:58:FF:FF:FF

Where this block sits

Previous 00:1F:57:00:00:00 /24 Phonik Innovation Co.,LTD Next 00:1F:59:00:00:00 /24 Kronback Tracers

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

EMH Energiemesstechnik GmbH holds 1 registered blocks in the IEEE registry, ranking #11,695 of 33,427 organizations by block count.