TVT CO.,LTD MAC prefixes: vendor identified; device type unknown
Summary
- // what this is
- TVT is registered to MAC prefix
00:18:AEand 1 more in the IEEE OUI database. When a device's MAC address begins with00:18:AE, that block was registered by TVT — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Both listed prefixes are 24 bits, leaving 24 suffix bits (16,777,216 possible suffix values per prefix). For both, the first-byte Group and Local bits are 0. These bits are fixed for an exact literal prefix match; changing either bit changes the prefix. Possible suffix values do not represent observed devices or shipments. An address match indicates a registry assignment only.
About this vendor.
A MAC address beginning with 00:18:AE or 58:5B:69 matches an IEEE MA-L assignment to TVT CO.,LTD; the assignment does not identify a particular device or product. The IEEE records provide no device-category mapping for either prefix, so the device type is unknown.
Each prefix is 24 bits long, leaving 24 bits, or 16,777,216 possible suffix values, within the matching block. This is the number of possible suffixes, not a count of devices, shipments, or observed addresses. RFC 7042 describes 48-bit MAC identifiers as having an assigned initial prefix and additional bits.
For both recorded prefixes, the first octet has Group bit 0 and Local bit 0. Those bits are fixed for an exact literal prefix match. Changing either bit produces a different prefix; the bits do not describe variation among addresses within these fixed prefixes. A match supports the registry assignment only, not deployment, prevalence, current vendor identity, or security status.
- Registry
- MA-L; two assigned prefixes [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv