Shenzhen Neoway Technology Co.,Ltd. MAC Prefix Assignments
Summary
- // what this is
- Shenzhen Neoway Technology is registered to MAC prefix
3C:9F:CDand 2 more in the IEEE OUI database. When a device's MAC address begins with3C:9F:CD, that block was registered by Shenzhen Neoway Technology — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- The prefixes are 24-bit MA-L assignments and a 28-bit MA-M assignment. For each exact prefix, the first-byte Group and Local bits are zero; changing either bit changes the prefix. The remaining suffix space contains 16,777,216 possible values per MA-L assignment and 1,048,576 for the MA-M assignment. These are possible suffix values, not device or shipment counts. A match indicates a registry assignment, not a particular device, deployment, traffic prevalence, current identity, or security state.
About this vendor.
A MAC address beginning with 3C:9F:CD, B4:77:48, or 28:2C:02:8 matches a registry assignment to Shenzhen Neoway Technology Co.,Ltd.; the assignment alone does not identify a device or product. The supplied records provide no device category or product-to-prefix mapping.
The IEEE records list two MA-L assignments, 3C:9F:CD and B4:77:48, and one MA-M assignment, 28:2C:02:8/28. Their distinct prefix lengths define different matching boundaries: the MA-L prefixes match 24 bits, while the MA-M prefix matches 28 bits. A matching address therefore has 24 or 20 remaining suffix bits, respectively.
For all three exact prefixes, the first-byte Group and Local bits are both zero. RFC 7042 describes these bits as significant in MAC addresses; changing either bit changes the prefix and no longer matches the exact assignment. Each MA-L boundary allows 16,777,216 possible suffix values, and the MA-M boundary allows 1,048,576. These are possible address values, not counts of devices or shipments. A prefix match establishes a registry match, not deployment, traffic prevalence, current identity, or security status.
- Matching prefixes
3C:9F:CD(MA-L);B4:77:48(MA-L);28:2C:02:8/28(MA-M)- Device category
- Not established by the supplied records.
- Company
- Shenzhen Neoway Technology Co.,Ltd. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefix assignments
3C:9F:CD,B4:77:48[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Prefix assignment
28:2C:02:8/28[Confirmed] — https://standards-oui.ieee.org/oui28/mam.csv- Country
- China (CN) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device category
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv