CID: a Company ID, not a MAC OUI. It identifies an organization for use in other IEEE 802 protocols, most commonly locally administered ELI-quadrant addresses, rather than being burned into hardware directly.
Prefix4A:F5:7D:00:00:00 /24
Vendor addressAltlaufstr. 40 Höhenkirchen-Siegertsbrunn Bavaria DE 85635
Country🇩🇪 Germany
RegisteredAug 8, 2025
Block range4A:F5:7D:00:00:00– 4A:F5:7D:FF:FF:FF
Address capacity16,777,216
AdministrationLocally administered: set by software, not burned into hardware
TransmissionUnicast: addressed to a single device
IEEE 802c quadrantELI: Extended Local Identifier
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 →
Example addresses in this block
Where this block sits
ASAM e.V. holds 1 registered blocks in the IEEE registry, ranking #5,552 of 33,421 organizations by block count.