00:0E:5F MAC Prefix: Registered to activ-net GmbH & Co. KG

A MAC address beginning with 00:0E:5F matches an IEEE MA-L assignment registered to activ-net GmbH & Co. KG. This identifies the registry assignment associated with the prefix; it does not identify a specific device, product, operating system, current vendor identity, or security state.

00:0E:5F is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values. That number describes the address space, not a count of devices or shipments. The first octet 00 has Group bit 0 and Local bit 0. For this exact prefix match, both bits are fixed; changing either bit yields a different prefix.

RFC 7042 describes a 48-bit MAC identifier as beginning with a three-octet OUI, followed by three additional octets; it also notes that the Group and Local bits in the initial octet have special significance. To check whether a captured address begins with the IEEE-listed 00:0E:5F assignment, compare its first three octets with that prefix. The supplied IEEE record contains no assignment date.

Registry match

00:0E:5F is assigned to activ-net GmbH & Co. KG under MA-L. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Address boundary

The 24-bit prefix leaves 24 suffix bits, allowing 16,777,216 possible values; this is not a device count. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Bit interpretation

Group bit 0 and Local bit 0 are fixed for this exact prefix. [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt