The OUI prefix 8C:1E:D9 is registered to Beijing Unigroup Tsingteng Microsystem Co., Ltd., a Beijing-based semiconductor and IC-design firm that operates under the Tsinghua Unigroup umbrella. The registry address — 06F, West District, Block D, Tsinghua Tongfang Science and Technology Plaza, 1 Wangzhuang Road, Haidian District, Beijing — places it squarely in China's principal technology cluster. Tsingteng is a chip vendor rather than a networking-equipment OEM: its public product line covers IoT chips, secure memory and EEPROM (the TH24C series), serial flash memory (the TH25Q series in SOP8/WSON8 packages), NFC controllers, and eSIM chips. The company is a GSMA member and holds a GlobalPlatform secure-element product qualification (GP_QC_0722, recognized March 2024), both consistent with a smart-card and eSIM focus rather than routers or access points. Because the firm makes embeddable silicon, any device observed presenting 8C:1E:D9 is most plausibly an IoT endpoint or embedded module carrying a Tsingteng SoC, not a standalone network appliance — no specific network-appliance or AP product line is publicly documented. Two supply-chain caveats are worth flagging for asset classification. First, provenance: Tsingteng's parent Tsinghua Unigroup is a Chinese state-linked enterprise that defaulted on bonds in 2020–2021 (totaling roughly $3.6B) and was restructured under Beijing Zhiguangxin Holding in 2022, which raises questions about firmware-support continuity for already-shipped devices. Second, dating: third-party MAC lookup tools cite a "7 May 2021" registration date, but IEEE publishes no assignment date for any OUI — that value is a database artifact and is not recorded here as fact.
- IEEE assignment
- 8C:1E:D9 → Beijing Unigroup Tsingteng Microsystem Co., LTD. [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv, line
MA-L,8C1ED9,...); corroborated by maclookup.app and uic.io
- Registry / block size
- MA-L (24-bit OUI), covering 8C:1E:D9:00:00:00 – 8C:1E:D9:FF:FF:FF (~16.8M addresses) [Confirmed] — IEEE MA-L; maclookup.app. Entry present only in oui.csv (MA-L); not in mam.csv or oui36.csv. NOTE: IEEE public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.
- HQ / country
- 06F, West District, Block D, Tsinghua Tongfang Science and Technology Plaza, 1 Wangzhuang Road, Haidian District, Beijing, CN 1000083 [Confirmed] — IEEE MA-L registry address; uic.io
- Company type
- semiconductor / IC-design (chip vendor), not a networking-equipment OEM [Confirmed] — gsma.com; elnec.com device list
- Parent / affiliation
- Tsinghua Unigroup (Chinese state-linked semiconductor group, HQ Beijing); bond defaults 2020–2021 (~$3.6B total), ownership restructured to Beijing Zhiguangxin Holding in 2022; former CEO Zhao Weiguo received a suspended death sentence on corruption charges, May 2025 [Likely] — en.wikipedia.org/wiki/Tsinghua_Unigroup; udger.com
- Device types
- IoT chips, secure memory / EEPROM (TH24C128, TH24C64), serial flash (TH25Q32HA, TH25Q64HA — SOP8/WSON8, some QuadSPI), NFC controllers, eSIM chips [Likely] — elnec.com device list; gsma.com. The MA-L block is likely used for embedding into IoT devices or smart-card/eSIM modules; devices on 8C:1E:D9 are most likely IoT endpoints or embedded modules, not standalone routers/switches/APs.
- Certifications
- GSMA member; GlobalPlatform Product Qualification GP_QC_0722 (recognized card product, March 2024) [Likely] — gsma.com; globalplatform.org (GP_QC_0722 PDF)
- Company status
- active as of 2025 (exhibited at MWC Shanghai 2025) [Likely] — mwcshanghai.com exhibitor listing
- Vendor website
- Unknown — no publicly confirmed standalone vendor URL found; parent group site is unigroup.com.cn but does not list Tsingteng as a named subsidiary [Unknown] — unigroup.com.cn
- IANA reference
- none — OUI/MA-L entries carry no IANA reference [Confirmed] — IEEE OUI data has no such column
- Analyst note
- An 8C:1E:D9 globally-administered address indicates hardware containing Tsingteng silicon, most plausibly an IoT/embedded endpoint from a state-linked Chinese supply chain. No public CVE record for Tsingteng chips was found in this pass; the eSIM/NFC line is security-critical by nature (GP-qualified secure elements); post-restructuring firmware-support continuity is uncertain. [Likely] — gsma.com; en.wikipedia.org/wiki/Tsinghua_Unigroup