ADVANCED TELECOMMUNICATIONS MODULES, LTD. — vendor identification unknown
Summary
- // what this is
- Advanced Telecommunications Modules is registered to MAC prefix
00:20:2Bin the IEEE OUI database. When a device's MAC address begins with00:20:2B, that block was registered by Advanced Telecommunications Modules — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A MAC beginning 00:20:2B matches this MA-L registry assignment; the supplied sources do not identify a specific device or product. The prefix is 24 bits, leaving 24 suffix bits and 16,777,216 possible suffix values, not an observed device or shipment count. For this exact prefix, the first-byte Group and Local bits are both zero; toggling either changes the prefix. A registry match does not establish deployment, traffic prevalence, current vendor identity, or security state.
About this vendor.
A MAC address beginning 00:20:2B matches an IEEE MA-L assignment to ADVANCED TELECOMMUNICATIONS MODULES, LTD.; the supplied records do not identify a device or product for that prefix.
This is a 24-bit prefix, leaving 24 bits for suffix values. There are 16,777,216 possible suffix values, a mathematical capacity rather than a count of devices, shipments, or observed addresses.
For this exact prefix, the first-byte Group bit and Local bit are both zero. Under RFC 7042’s guidance, those bit positions have multicast/group and local significance; changing either bit produces a different prefix and is not a variation within this fixed assignment. A matching address supports the registry match only, not a particular device, deployment, or current company identity.
- Registry match
- ADVANCED TELECOMMUNICATIONS MODULES, LTD. — MA-L assignment
00:20:2B[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv - Device or product
- Unknown from the supplied records [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- United Kingdom, as indicated by
GBin the registry record [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv