IDT Technology Limited: MAC prefix identifies the registry assignee
Summary
- // what this is
- IDT Technology is registered to MAC prefix
98:F8:C1and 1 more in the IEEE OUI database. When a device's MAC address begins with98:F8:C1, that block was registered by IDT Technology — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Both MA-L assignments have 24-bit prefixes with 24-bit suffixes. For each exact prefix, Group and Local bits are fixed at 0; changing either bit produces a different prefix. Each prefix has 16,777,216 possible suffix values, not an inferred device or shipment count. Registry assignment does not identify a particular device or deployment.
About this vendor.
A MAC address beginning with 98:F8:C1 or 00:17:7D identifies an IEEE MA-L assignment to IDT Technology Limited; the records do not identify a device category or product using either prefix.
Both prefixes are 24 bits long, leaving 24 bits for the suffix. The IEEE records list two assignments to the same legal name. That is registry evidence only: a matching address cannot establish a particular device, deployment, traffic prevalence, or current company identity.
The first octet of each listed prefix has Group bit 0 and Local bit 0. For an exact prefix match, those bits are fixed. Turning either bit on changes the prefix and no longer produces an exact match to these assignments. Each prefix permits 16,777,216 possible suffix values; that is an address-space count, not a count of devices or shipments.
RFC 7042 explains that 48-bit MAC identifiers include an initial organizational prefix and additional bits, and describes the Group and Local bits. Treat a prefix match as an identification clue for the assignment, then use other evidence to identify a device.
- Device category
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Assigned prefixes
98:F8:C1and00:17:7D(MA-L) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv