YICHEN (SHENZHEN) TECHNOLOGY CO.LTD MAC Prefixes: Vendor Identified, Devices Unknown
Summary
- // what this is
- Yichen is registered to MAC prefix
50:33:F0and 1 more in the IEEE OUI database. When a device's MAC address begins with50:33:F0, that block was registered by Yichen — 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; this does not establish actual device or shipment counts. Both prefixes have Group bit 0 and Local bit 0 in the first byte. A matching address supports the registry assignment only, not a particular device, operating system, current legal identity, deployment, or security state.
About this vendor.
A MAC address beginning with 50:33:F0 or 38:02:E3 matches an IEEE MA-L assignment recorded to YICHEN (SHENZHEN) TECHNOLOGY CO.LTD; the specific device or product is unknown. The two records show the same Shenzhen company name with a punctuation variant, but do not establish a broader corporate group or brand relationship.
Each prefix is 24 bits long, leaving 24 bits for suffix values: 16,777,216 possible values per prefix. This is address-space arithmetic, not a device, shipment, or deployed-address count. Under RFC 7042, the first octet's Group bit is bit 0 and Local bit is bit 1. Both are zero for these exact prefixes, so the first byte indicates individual and globally administered addressing. Changing either bit produces a different prefix; these fixed values do not vary within a literal match.
A match supports identifying the registry assignment only. It does not establish which device made a capture, whether an address is currently deployed, or the product or operating system involved. The IEEE records identify China, but provide no assignment dates. No supplied company material documents products or industry for this legal entity.
- Vendor
- YICHEN (SHENZHEN) TECHNOLOGY CO.LTD is the recorded assignee for both prefixes.
- Device identity
- Unknown; the records do not map either prefix to a device category or product.
- Registry
- MA-L, with two 24-bit assignments.
- Prefix match
50:33:F0or38:02:E3matches the corresponding 24-bit prefix; the remaining 24 bits are suffix space, not a device count.- Address bits
- Group and Local bits are both zero in each exact first octet; changing either bit gives a different prefix.
- Country
- China, as stated in the IEEE records.
- Company
- YICHEN (SHENZHEN) TECHNOLOGY CO.LTD [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
50:33:F0[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Prefixes
38:02:E3[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- China [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device category
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv