Wiwynn holds MA-L block(s) registered as "Wiwynn Corporation" (an additional "Wiwynn Corporation Tainan Branch" registrant string also appears in IEEE-sourced data). The HQ is in New Taipei City, Taiwan, with a Tainan branch address also on file. These OUIs appear on hyperscale and cloud server systems and boards, storage systems, and rack-scale infrastructure built to Open Compute Project (OCP) designs. Wiwynn is a Wistron-group spin-off that became an independent public company focused on hyperscale and cloud datacenter systems. The key analyst point is the ODM "OUI ≠ retail brand" pattern: these servers are custom-built for hyperscalers and appear in cloud and hyperscale fleets rather than under a consumer or enterprise brand. For triage, if you see a Wiwynn OUI in an on-prem environment, it usually indicates OCP-style or cloud-provider-derived hardware. Note the Wistron-group lineage, which cross-references the already-covered Wistron Corporation and Wistron NeWeb.
- IEEE assignment
- "Wiwynn Corporation" (+ "Wiwynn Corporation Tainan Branch" string) [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L [Confirmed] — IEEE oui.csv
- HQ / country
- New Taipei City, Taiwan (HQ); Tainan branch address also on file [Confirmed] — maclookup.app
- Company status
- active; Wistron-group spin-off (independent public company) focused on hyperscale/cloud datacenter systems [Confirmed] — wiwynn.com
- Device types
- hyperscale/cloud server systems and boards, storage systems, rack-scale infrastructure (OCP designs) [Confirmed] — maclookup.app
- Notable products
- OCP/hyperscale servers and rack-scale infrastructure for cloud providers
- Verified prefix(es)
- 5C:FE:9E [Confirmed] — IEEE oui.csv
- Special note
- ODM "OUI ≠ retail brand" — Wiwynn servers are custom-built for hyperscalers and appear in cloud/hyperscale fleets, not under a retail brand. Wistron-group lineage (cross-ref Wistron Corporation / Wistron NeWeb). Multiple registrant strings (HQ + Tainan branch). The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Wistron group (Wistron Corporation, Wistron NeWeb)
- Analyst note
- A Wiwynn OUI is an ODM "OUI ≠ retail brand" signal; if seen on-prem it usually indicates OCP-style or cloud-provider-derived hardware.