ABB Oy / Medium Voltage Products: MAC prefix identification
Summary
- // what this is
- ABB Oy / Medium Voltage Products is registered to MAC prefix
00:21:C1in the IEEE OUI database. When a device's MAC address begins with00:21:C1, that block was registered by ABB Oy / Medium Voltage Products — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- The exact 24-bit prefix fixes the first-octet Group and Local bits at zero; the remaining 24 bits permit 16,777,216 suffix values, which is not an observed device or shipment count. A match establishes the registry assignment only.
About this vendor.
A MAC address beginning 00:21:C1 is assigned in the IEEE MA-L registry to ABB Oy / Medium Voltage Products; the record does not identify a device category. The assignment identifies a registry holder, not a particular device, product, deployment, or current vendor status.
This is one 24-bit prefix, leaving 24 bits for the remainder of a 48-bit identifier. The IEEE record provides no assignment date. RFC 7042 explains that the Group and Local bits are in the first octet: for 00, both are zero. Those values are fixed for this exact prefix; changing either bit produces a different prefix. The 24 remaining bits allow 16,777,216 possible suffix values, not a count of devices or shipments.
For identification, compare the first three octets exactly with 00:21:C1. A match supports the registry assignment only. It does not establish which product is involved or whether the address is in use by ABB.
- Company
- ABB Oy / Medium Voltage Products [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Assigned prefix
00:21:C1[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Assignment date
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Group and Local bits
- Both are zero in the first octet
00; changing either changes the prefix [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt