ADDTRON TECHNOLOGY CO., LTD.: Vendor identified; device type Unknown
Summary
- // what this is
- Addtron Technology is registered to MAC prefix
00:40:33in the IEEE OUI database. When a device's MAC address begins with00:40:33, that block was registered by Addtron Technology — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- RFC 7042 explains the Group bit (01) and Local bit (02) in the initial octet; here both are zero in 00:40:33 and are fixed for this exact prefix. It covers 24 initial bits and leaves 24 suffix bits, or 16,777,216 possible suffix values, not a device or shipment count. A matching prefix identifies a registry assignment only; it does not establish deployment, product, current vendor identity, or security state.
About this vendor.
A MAC address beginning 00:40:33 matches the IEEE MA-L assignment to ADDTRON TECHNOLOGY CO., LTD.; the available evidence does not identify a device type or a product using this prefix.
The assignment covers 24 initial bits of a 48-bit MAC identifier, leaving 24 bits for suffix values. This gives 16,777,216 possible suffix values; it is a mathematical range, not a count of devices, shipments, or observed addresses.
In 00:40:33, the first octet is 00. RFC 7042 identifies the Group bit (01) and Local bit (02) as special bits in the initial octet, and states that OUIs and longer MAC prefixes are assigned with the Local bit zero and Group bit unspecified. The supplied IEEE registry entry assigns prefix 00:40:33 to ADDTRON TECHNOLOGY CO., LTD. A registry match identifies the assignment only; it does not establish deployment, traffic prevalence, product, current vendor identity, or security state.
- Registry match
ADDTRON TECHNOLOGY CO., LTD.is listed for00:40:33in the IEEE MA-L registry. [Confirmed]- Device type
- Unknown; no supplied source maps a device category to this exact prefix. [Unknown]
- Assignment scope
00:40:33fixes the first 24 bits; 24 suffix bits allow 16,777,216 possible values. [Confirmed]- Address bits
- The first octet has Group bit 0 and Local bit 0. [Confirmed]
- Company
ADDTRON TECHNOLOGY CO., LTD.[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Registry
MA-L[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Prefixes
00:40:33[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Total prefix count
- 1 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- US [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device types
- Unknown [Unknown]
- Notable products
- Unknown [Unknown]
- Industry
- Unknown [Unknown]
- Organization status
- Unknown [Unknown]
- Historic prefix
- Unknown [Unknown]
- Website
- Unknown [Unknown]
- Related vendors
- Unknown [Unknown]
- Assignment dates
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv