Shanghai Wind Technologies Co.,Ltd: MAC prefixes identify registry assignments
Summary
- // what this is
- Shanghai Wind Technologies is registered to MAC prefix
1C:CD:E5and 1 more in the IEEE OUI database. When a device's MAC address begins with1C:CD:E5, that block was registered by Shanghai Wind Technologies — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Each listed assignment is an exact 24-bit prefix with 24 remaining bits and 16,777,216 possible suffix values. The first-octet Group and Local bits are both zero for each literal prefix. Possible suffix values do not indicate actual device or shipment counts.
About this vendor.
A MAC address beginning with 1C:CD:E5 or FC:53:9E matches an IEEE MA-L assignment to Shanghai Wind Technologies Co.,Ltd; the records do not identify a device or product. Both assignments are 24-bit prefixes, leaving 24 address bits after the prefix. Their matching boundaries are the first three octets, so a match supports the registered assignment only.
For the literal prefixes 1C:CD:E5 and FC:53:9E, the Group bit and Local bit in the first octet are both zero, as calculated from the IEEE-assigned prefix values using the bit masks described in RFC 7042. RFC 7042 describes the Group bit as distinguishing group from individual identifiers. Setting either bit changes the first octet, so the result no longer has the exact registered prefix.
Each 24-bit prefix leaves 24 suffix bits, allowing 16,777,216 possible suffix values; this is a count of address-space possibilities, not devices, shipments, or observed use.
The available records provide no device category, product catalog, industry, or first-party company material. A captured match alone cannot establish a product, operating system, current vendor identity, deployment, traffic prevalence, or security state. IEEE assignment dates are unavailable in these records.
- Prefix matches
1C:CD:E5andFC:53:9E, each an exact 24-bit prefix [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Group and Local bits
- Both are zero in the first octet of each assigned prefix, calculated from the IEEE records and RFC 7042 bit masks [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv; https://www.rfc-editor.org/rfc/rfc7042.txt
- Company
- Shanghai Wind Technologies Co.,Ltd [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- China [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Notable products
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Website
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Organization status
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Related vendors
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Historic prefix
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv