Nordwestdeutsche Zählerrevision

MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

Prefix00:25:F3:00:00:00 /24

Vendor addressIng. Aug. Knemeyer GmbH & Co. KG Bad Laer Niedersachsen DE 49196

RegisteredApr 26, 2009

Block range00:25:F3:00:00:00– 00:25:F3: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

Apr 26, 2009 – Nov 7, 2009 Nordwestdeutsche Zählerrevision name changed
Nov 7, 2009 – Feb 6, 2010 Nordwestdeutsche ZÃ¤hlerrevision name changed
Feb 6, 2010 – Aug 24, 2010 Nordwestdeutsche Zählerrevision name changed
Aug 24, 2010 – Aug 25, 2010 Nordwestdeutsche ZÃÂ¤hlerrevision name changed
Aug 25, 2010 – Nov 17, 2011 Nordwestdeutsche Zählerrevision name changed
Nov 17, 2011 – Nov 18, 2011 Nordwestdeutsche ZÃÂ¤hlerrevision name changed
Nov 18, 2011 – Sep 17, 2012 Nordwestdeutsche ZÃ¤hlerrevision name changed
Sep 17, 2012 – Nov 29, 2012 Nordwestdeutsche ZÃÂÃÂÃÂÃÂ¤hlerrevision name changed
Nov 29, 2012 – Aug 27, 2015 Nordwestdeutsche ZÃ¤hlerrevision name changedaddress changed
Aug 27, 2015 – present Nordwestdeutsche Zählerrevision

Example addresses in this block

00:25:F3:00:00:00 00:25:F3:7F:FF:FF 00:25:F3:FF:FF:FF

Where this block sits

Previous 00:25:F2:00:00:00 /24 Commscope Next 00:25:F4:00:00:00 /24 KoCo Connector AG

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

Nordwestdeutsche Zählerrevision holds 1 registered blocks in the IEEE registry, ranking #21,539 of 33,427 organizations by block count.