GCI Science & Technology Co.,LTD MAC prefixes: device identity unknown
Summary
- // what this is
- GCI Science & Technology is registered to MAC prefix
B4:01:42and 1 more in the IEEE OUI database. When a device's MAC address begins withB4:01:42, that block was registered by GCI Science & Technology — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Each listed prefix is 24 bits, leaving 24 suffix bits and 16,777,216 possible suffix values per prefix; possible values are not a device or shipment count. For these exact prefixes, the first-byte Group and Local bits are 0. Changing either bit produces a different prefix. A prefix match indicates a registry assignment, not a particular device, operator, or security state.
About this vendor.
A MAC address beginning with B4:01:42 or 00:1A:7F identifies an IEEE MA-L assignment to GCI Science & Technology Co.,LTD; the supplied records do not identify a device category or product using either prefix. The assignment identifies the registry holder, not the current operator, a particular device, its safety, or its network activity.
Both assignments are 24-bit prefixes, leaving 24 bits for suffix values. Each therefore has 16,777,216 mathematically possible suffix values; that is not a count of devices produced, deployed, or observed. For the exact prefixes shown, the first-byte Group and Local bits are both zero. Changing either bit changes the prefix and is not a variation within the fixed assignment.
The IEEE CSV records provide no assignment dates. RFC 7042 describes the 48-bit MAC structure and the Group and Local bits; here, the hexadecimal interpretation applies to these two literal prefixes. The address text includes CN, indicating China, but supplies no basis for inferring products, industry, or a device type.
- Device identification
- Unknown; no supplied source maps either prefix to a device category.
- Company
- GCI Science & Technology Co.,LTD [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
B4:01:42and00:1A:7F[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- China [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device type
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Assignment dates
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv