macadress

Sphairon Technologies GmbH

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1C:28:00:00:00 /24
Vendor addressPhilipp-Reis-Strasse 1 Bautzen Saxony DE 02625
Country🇩🇪  Germany
RegisteredMay 13, 2007
Block range00:1C:28:00:00:00– 00:1C:28: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. May 13, 2007 – Jul 8, 2010 Sphairon Access Systems GmbH name changed
  2. Jul 8, 2010 – present Sphairon Technologies GmbH

Example addresses in this block

00:1C:28:00:00:00 00:1C:28:7F:FF:FF 00:1C:28:FF:FF:FF

Where this block sits

Previous 00:1C:27:00:00:00 /24 Sunell Electronics Co. Next 00:1C:29:00:00:00 /24 CORE DIGITAL ELECTRONICS CO., LTD

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

Sphairon Technologies GmbH holds 1 registered blocks in the IEEE registry, ranking #28,195 of 33,421 organizations by block count.