OCTOTHORPE CORP. MAC prefixes: device identity unknown
Summary
- // what this is
- Octothorpe is registered to MAC prefix
00:BB:01and 1 more in the IEEE OUI database. When a device's MAC address begins with00:BB:01, that block was registered by Octothorpe — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Both assignments match 24 prefix bits and leave 24 suffix bits (16,777,216 possible values each). The Group bit is 0 for both prefixes; the Local bit is 0 for 00:BB:01 and 1 for 02:BB:01. These bits are fixed for an exact prefix match. A prefix match identifies a registry assignment, not a device, deployment, or security state.
About this vendor.
A MAC address beginning 00:BB:01 or 02:BB:01 identifies an IEEE MA-L registry assignment to OCTOTHORPE CORP.; the supplied evidence does not identify a device, product, or device category for either prefix. The registry record indicates the country as the United States. It does not establish where these addresses are deployed, how often they appear, or whether they are currently used by the named company.
Both assignments are 24-bit prefixes, so each matches the first three octets of a 48-bit MAC address. Each leaves 24 suffix bits, or 16,777,216 possible suffix values; that is a mathematical address space, not a count of devices or shipments. In the first-byte arithmetic, 00 has Group bit 0 and Local bit 0, while 02 has Group bit 0 and Local bit 1. These bits are fixed for an exact prefix match.
Changing either bit changes the prefix; it does not describe variation within that assignment. A prefix match establishes the registry allocation only, not a particular device or its security state.
- Vendor
- OCTOTHORPE CORP. is the registry assignee for these prefixes.
- Device identity
- Unknown; no supplied source maps either exact prefix to a device category.
- Matching prefixes
00:BB:01and02:BB:01(both MA-L, 24 bits).
- Company
- OCTOTHORPE CORP. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
00:BB:01,02:BB:01[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- United States [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device category
- Unknown [Unknown] — https://www.rfc-editor.org/rfc/rfc7042.txt
- Assignment date
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv