Snell MAC prefixes: vendor assignment identified; device type unknown
Summary
- // what this is
- Snell is registered to MAC prefix
00:05:81and 1 more in the IEEE OUI database. When a device's MAC address begins with00:05:81, that block was registered by Snell — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Both assigned prefixes are 24 bits long, leaving 24 suffix bits (16,777,216 possible suffix values per prefix). In each exact literal prefix, the first-octet Group bit (mask 0x01) and Local bit (mask 0x02) are zero and fixed. Changing either bit produces a different prefix. The suffix-value count does not represent observed devices or shipments. A prefix match establishes only a registry assignment, not a particular device, operator, or security state.
About this vendor.
A MAC address beginning with 00:05:81 or 00:23:70 matches an IEEE MA-L assignment registered to Snell; the records do not identify a device type. The two entries are separate assignments, and their similar organization names alone do not establish a shared corporate identity or brand history.
Each prefix is 24 bits, leaving 24 suffix bits and 16,777,216 possible suffix values per prefix. That is a mathematical address space, not a count of devices, products, or shipments. A match establishes that the address begins with a prefix recorded to Snell; it does not establish who currently operates the device or what product it is.
Under RFC 7042, the Group bit and Local bit are the first-octet bits with masks 01 and 02. Both prefixes start with 00, so both bits are zero and fixed for an exact literal match. Changing either bit changes the prefix and is not a match to these assignments. Use all three prefix octets when comparing a captured address.
- Device type
- Unknown; the supplied records do not specify one [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L; two full 24-bit assignments [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- GB appears in the supplied registry records [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Snell [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
00:05:81(MA-L) and00:23:70(MA-L) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- GB [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device type
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv