The OUI prefix 9C:CB:F7 is a single MA-L (MAC Address Block Large) assignment registered to "CLOUD STAR TECHNOLOGY CO., LTD." at 13F.-1, No. 167, Wenqing Rd, Guishan Dist, Taoyuan City, Taoyuan 333613, Taiwan. The MA-L allocation is the standard 24-bit OUI block, giving the holder roughly 16.7 million addresses for the lower 24 bits. Both the IEEE registry file and the third-party maclookup.app mirror agree on the company name, the prefix, and the registered address, so the vendor identity and its Taiwanese registration are well corroborated. Beyond identity, the public record is thin. Cloud Star is a small hardware vendor registered in Guishan District, Taoyuan — a major electronics-manufacturing zone — but web research surfaced no product listings, device category (router, IoT module, NIC, access point, etc.), distributor pages, or a live corporate website; an attempt to reach cloud-star.com.tw returned a refused connection. No CVEs, security advisories, threat-intel reports, or device-fingerprint database hits reference this company or the 9C:CB:F7 prefix as of June 2026. The practical takeaway: 9C:CB:F7 on a globally-administered address identifies hardware from this specific Taiwanese vendor, but there is not enough public data to say what kind of device it is, and the absence of security findings reflects low public visibility rather than a confirmed clean record.
- IEEE assignment
- 9C:CB:F7 → CLOUD STAR TECHNOLOGY CO., LTD. [Confirmed] — IEEE MA-L registry (enrichment/registries/oui.csv line 334; mirrored at https://api.maclookup.app/v2/macs/9CCBF7)
- Registry / block size
- MA-L (24-bit OUI; ~16,777,216 lower-24-bit addresses) [Confirmed] — https://api.maclookup.app/v2/macs/9CCBF7 (IEEE-sourced)
- Registered address
- 13F.-1, No. 167, Wenqing Rd, Guishan Dist, Taoyuan City, Taoyuan 333613, TW [Confirmed] — IEEE MA-L; https://api.maclookup.app/v2/macs/9CCBF7
- Country
- Taiwan (TW) [Confirmed] — IEEE MA-L; https://api.maclookup.app/v2/macs/9CCBF7
- Registration date
- Unknown — IEEE's public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address). A "2022-11-28" value appears on maclookup.app, but that is a third-party database artifact and must never be attributed to IEEE. [Unknown for any IEEE-sourced date] — https://maclookup.app/vendors/cloud-star-technology-co-ltd (third-party artifact, not an IEEE fact)
- Company status
- Unknown — no corporate registry confirmation, filings, or live website found. [Unknown]
- Device types
- Unknown — no product listings, device category, or vendor catalog found through web research; 9C:CB:F7 has not appeared in observed-device databases or security scans indexed as of June 2026. [Unknown]
- Vendor website
- Unknown — cloud-star.com.tw returned ECONNREFUSED (no live site); no official website located. [Unknown]
- Security context
- Unknown — no CVEs, advisories, threat-intel reports, botnet activity, or default-credential exposure referencing Cloud Star or 9C:CB:F7 in any indexed source. Absence of findings is not a security clearance; it likely reflects low public visibility. [Unknown]
- Usage / deployment context
- Unknown — small Taiwanese hardware vendor in Guishan District, Taoyuan (an electronics-manufacturing zone); no distributor listings, import records, or device-fingerprint entries found. MA-L block size (~16.7M) is the standard large allocation and does not by itself indicate deployment volume. [Unknown]
- IANA reference
- blank — none applicable; left blank rather than fabricated. [Unknown]
- Analyst note
- A globally-administered 9C:CB:F7 address reliably identifies hardware from this specific vendor, but OUI alone cannot tell you the device type, and the lack of security findings is a visibility gap, not a verified-safe signal.