Qisda holds 8 IEEE blocks (about 118.5 million addresses) registered as "Qisda Corporation" at No. 157, Shanying Rd., Gueishan Dist., Taoyuan City, Taiwan, spanning MA-L (24-bit) and MA-M (28-bit). Verified samples include 00:03:9D, 00:17:CA, 00:1E:21, 1C:E1:92, 64:E2:20, C0:C4:F9, and D0:76:0C (MA-L), plus an MA-M block beginning FC:61:79:5. These OUIs appear on monitors and displays, projectors, medical devices, networking, and consumer electronics assembled for other brands, including BenQ. The decisive corporate history is the brand/ODM split that completed in September 2007: a new legal entity, BenQ Corporation, was established for the branded business (operations from 2007-09-03), while the original legal entity was renamed "Qisda Corporation" as the manufacturing/ODM arm — so Qisda and BenQ are distinct registrants post-2007. The key analyst point is the EMS/ODM pattern: a Qisda OUI may appear on a device sold under another brand. For triage, a Qisda OUI flags a Qisda-manufactured device — the on-screen brand may be BenQ or a third party — so map it to "Qisda-built" rather than a specific brand.
- IEEE assignment
- 8 prefixes → "Qisda Corporation", registered Taoyuan City, Taiwan [Confirmed] — IEEE MA-L/MA-M
- Registry / block size
- MA-L + MA-M; 8 blocks (~118.5M addresses) [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- No. 157, Shanying Rd., Gueishan Dist., Taoyuan City 33341, Taiwan [Confirmed] — maclookup.app
- Company status
- active; brand/ODM split completed September 2007 — BenQ Corporation established for the branded business (operations 2007-09-03), original entity renamed Qisda (ODM arm) [Confirmed] — corporate history
- Device types
- monitors/displays, projectors, medical devices, networking, consumer electronics — assembled for other brands incl. BenQ [Confirmed] — maclookup.app
- Notable products
- displays/projectors and medical/networking devices built for BenQ and third parties
- Verified prefix sample
- 00:03:9D, 00:17:CA, 00:1E:21, 1C:E1:92, 64:E2:20, C0:C4:F9, D0:76:0C (MA-L); FC:61:79:5 (MA-M) [Confirmed] — maclookup.app
- Special note
- EMS/ODM "OUI ≠ brand" case. A Qisda OUI may appear on a device sold under another brand (including BenQ). Qisda and BenQ are distinct registrant entities post-2007. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- BenQ (sibling brand), Darfon (BenQ/Qisda group)
- Analyst note
- A Qisda OUI flags a Qisda-manufactured device; the on-screen brand may be BenQ or a third party — map to "Qisda-built" rather than a specific brand.