SPEEDTECH CORP. MAC prefixes — device type unknown
Summary
- // what this is
- Speedtech is registered to MAC prefix
D8:23:E0and 3 more in the IEEE OUI database. When a device's MAC address begins withD8:23:E0, that block was registered by Speedtech — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- The MA-L prefixes match 24 bits and leave 24 suffix bits; the MA-M prefixes match 28 bits and leave 20 suffix bits. Each listed prefix has Group and Local bits zero in its first byte. Changing either bit changes the prefix. Possible suffix values are address-space possibilities, not device or shipment counts.
About this vendor.
A MAC address beginning with one of these prefixes is registered to SPEEDTECH CORP.; the assignment alone does not identify a device category or a specific product. The IEEE records list two MA-L prefixes, D8:23:E0 and 7C:BF:77, and two MA-M prefixes, 2C:69:1D:4/28 and 9C:E5:49:0/28. The records indicate Taiwan, but provide no product or device mapping.
The MA-L prefixes match the first 24 bits of a 48-bit address, leaving 24 suffix bits, or 16,777,216 possible suffix values per prefix. Each MA-M prefix matches 28 bits and leaves 20 suffix bits, or 1,048,576 possible suffix values per prefix. These are address-space possibilities, not counts of devices or shipments. The four prefixes have different matching boundaries; they should not be treated as a shared /24 base.
For each listed prefix, the first-byte Group bit and Local bit are both zero. In an exact literal match, those bits are fixed; changing either bit produces a different prefix. RFC 7042 explains the role of these bits in MAC identifiers. A match supports identifying the registry assignment only; it does not establish the device, operating system, current vendor identity, or security state. Assignment dates are unavailable in these IEEE CSV records.
- Device identification
- Unknown; the records do not map these prefixes to a device category.
- Assignment count
- 4 prefixes across MA-L and MA-M.
- Company
- SPEEDTECH CORP. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
D8:23:E0,7C:BF:77,2C:69:1D:4/28,9C:E5:49:0/28[Confirmed] — MA-L assignments: https://standards-oui.ieee.org/oui/oui.csv; MA-M assignments: https://standards-oui.ieee.org/oui28/mam.csv- Device type
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Taiwan [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Assignment dates
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv