TomTom International BV MAC prefixes: vendor identified, device unknown
Summary
- // what this is
- TomTom International is registered to MAC prefix
24:E9:27and 1 more in the IEEE OUI database. When a device's MAC address begins with24:E9:27, that block was registered by TomTom International — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A 24-bit match identifies one of these registry assignments, not a particular device or product. For both prefixes, the first-byte Group bit (01) and Local bit (02) are fixed at zero; a changed bit produces a different prefix. Each assignment leaves 24 suffix bits, or 16,777,216 possible suffix values, which is not an actual device or shipment count. RFC 7042 distinguishes prefix assignments from address construction.
About this vendor.
A MAC address beginning with 24:E9:27 or 00:21:3E matches an IEEE MA-L assignment to TomTom International BV; the assigned prefix alone does not identify a device category. The IEEE records list the country as the Netherlands. They do not provide assignment dates, product details, or a mapping from either prefix to a particular product or device.
Both assignments are 24-bit prefixes, leaving 24 bits for the remainder of a 48-bit address. Each therefore permits 16,777,216 suffix values; this is an address-space count, not a count of devices or shipments. For both literal prefixes, the first-byte Group and Local bits are zero. RFC 7042 describes these bits and notes that prefix assignments and address construction have distinct meanings.
A captured address matching one of these prefixes supports an assignment match only. It does not establish a specific device, operating system, current vendor identity, traffic prevalence, or safety status.
- Device category
- Unknown; the supplied records do not map either prefix to a device category [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L; two assigned prefixes [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- TomTom International BV [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Netherlands [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
24:E9:27,00:21:3E[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Assignment dates
- Unavailable in these IEEE CSV records [Unknown] — https://standards-oui.ieee.org/oui/oui.csv