Alert Metalguard ApS MAC prefix: vendor identified, device unknown
Summary
- // what this is
- Alert Metalguard ApS is registered to MAC prefix
2C:E8:71in the IEEE OUI database. When a device's MAC address begins with2C:E8:71, that block was registered by Alert Metalguard ApS — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- The 24-bit prefix 2C:E8:71 leaves 24 suffix bits, allowing 16,777,216 possible suffix values, not establishing an actual device or shipment count. The initial octet 2C has Group bit 0 and Local bit 0. These bits are fixed for this exact literal prefix; changing either produces a different prefix. A match identifies a registry assignment, not a particular device, product, deployment, or security state.
About this vendor.
A MAC address beginning 2C:E8:71 matches an IEEE MA-L assignment to Alert Metalguard ApS; the assignment alone does not identify a device or product. No supplied evidence maps this prefix to a device category or specific product.
This is a 24-bit prefix, leaving 24 bits for the remaining address. Those bits can represent 16,777,216 possible suffix values, a mathematical range rather than a count of devices or shipments. A matching prefix establishes the registry assignment, not where or how an address is deployed.
The first octet is 2C. Its Group bit and Local bit are both zero, consistent with the RFC 7042 description of IEEE-assigned prefixes. For this exact literal prefix, those bits are fixed. Changing either bit produces a different prefix; that does not describe variation within the assignment. The displayed IEEE record provides no assignment date.
- Matching prefix
2C:E8:71(MA-L, 24 bits) [Confirmed]- Device category
- Unknown; no supplied source maps a device category to this exact prefix [Unknown]
- Country
- Denmark (DK), based on the registered address in Copenhagen; this does not establish deployment location [Confirmed]