Acronet Co., Ltd. — MAC prefix identifies the registry assignee
Summary
- // what this is
- Acronet is registered to MAC prefix
00:04:FFin the IEEE OUI database. When a device's MAC address begins with00:04:FF, that block was registered by Acronet — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A 24-bit prefix match leaves 24 suffix bits, corresponding to 16,777,216 possible suffix values, not an observed device or shipment count. For the exact prefix 00:04:FF, the first-byte Group and Local bits are both zero; changing either bit produces a different prefix. A match identifies the registry assignment, not a specific device or product.
About this vendor.
A MAC address beginning 00:04:FF matches an IEEE MA-L assignment to Acronet Co., Ltd. This identifies the registry assignee for that prefix; it does not identify a device model, prove who deployed an address, or establish current company identity or safety.
The assignment is 24 bits long, leaving 24 bits for suffix values: 16,777,216 possible values. That is a mathematical range, not a count of devices or shipments. For this literal prefix, the first byte is 00: its Group bit and Local bit are both zero. Changing either bit changes the prefix and no longer matches this exact assignment.
RFC 7042 describes 48-bit MAC identifiers as an assigned initial prefix followed by additional bits. A captured address matching 00:04:FF supports a prefix match only; it cannot establish a particular product or device. The IEEE CSV record gives the country code KR and does not provide an assignment date.
- Matching prefix
00:04:FF(24-bit MA-L) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Acronet Co., Ltd. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- South Korea (
KR) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv - Assignment date
- Assignment dates are unavailable in these IEEE CSV records. [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Technical interpretation
- A 48-bit MAC identifier can consist of an assigned initial prefix and additional bits; the first-octet Group and Local bits have special significance. [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt