Adaptive Recognition Hungary, Inc — vendor identified; device type Unknown
Summary
- // what this is
- Adaptive Recognition Hungary is registered to MAC prefix
00:1D:4Din the IEEE OUI database. When a device's MAC address begins with00:1D:4D, that block was registered by Adaptive Recognition Hungary — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Exact /24 match: first-byte Group and Local bits are both fixed at 0. The 24-bit suffix has 16,777,216 possible values; this is not a device or shipment count. An assignment match identifies the registry entry only.
About this vendor.
A MAC address beginning 00:1D:4D matches an IEEE MA-L assignment to Adaptive Recognition Hungary, Inc; the supplied records do not identify a device category for this prefix. The assignment identifies the registry entry, not a particular device, product, operating system, deployment, or security state.
This is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values. That is a mathematical address space, not a count of devices or shipments. The first-byte Group and Local bits are both zero in this literal prefix. Changing either bit changes the prefix, so those bits are fixed for an exact match.
RFC 7042 describes 48-bit MAC identifiers as an assigned prefix followed by additional bits, and explains the Group and Local bits. Assignment dates are unavailable in these IEEE CSV records.
- Device category
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv