Chengdu TD Tech Ltd. is the Chengdu-based subsidiary and largest R&D hub of TD Tech (鼎桥通信技术有限公司), a Chinese telecom-equipment maker founded in 2005 as a Nokia/Huawei joint venture. The registry records two confirmed MA-L blocks for this vendor, 9C:54:40 and D0:A0:D6, both registered to "ChengDu TD Tech" at the same Tianhua Second Road / Software Park address in Chengdu's high-tech zone. Each MA-L spans 16,777,216 addresses, so the two blocks together cover roughly 33.5 million addresses. The company makes industry-customized terminals (including rebranded Huawei-design handsets), 4G/5G enterprise wireless, and IoT gateways for public-security, government, transportation, and energy verticals — not consumer gear, so an address in either range on an enterprise network most likely indicates a professional rugged terminal, wireless AP, or IoT device. The ownership history carries a meaningful procurement signal: Nokia (originally 51%) exited the venture in 2023–2024, selling to a consortium of Huawei-aligned and Chengdu state-owned investors, leaving TD Tech effectively Huawei-aligned and state-linked. No product-specific CVEs or advisories naming this company were found, and no direct BIS Entity List / CISA entry for "Chengdu TD Tech" surfaced; however, Huawei itself has been on the U.S. BIS Entity List since May 2019, so regulated operators (U.S. federal, defense, critical infrastructure) should treat these prefixes with the elevated scrutiny applied to Huawei-family hardware. IEEE publishes no registration date for MAC/OUI assignments, so none is recorded here.
- IEEE assignment
- 9C:54:40 → "ChengDu TD Tech" (MA-L), registered Chengdu, CN [Confirmed] — IEEE MA-L (oui.csv)
- IEEE assignment
- D0:A0:D6 → "ChengDu TD Tech" (MA-L), registered Chengdu, CN, same registry address as 9C:54:40 [Confirmed] — IEEE MA-L (oui.csv)
- Registry / block size
- MA-L (24-bit OUI); each block ~16.78M addresses. Two blocks (9C:54:40, D0:A0:D6) confirmed in the IEEE registry CSV, both registered to "ChengDu TD Tech" at the same address. [Confirmed] — IEEE oui.csv. NOTE: IEEE's public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools is a database artifact, not an IEEE fact.
- Organization / country
- ChengDu TD Tech, China (CN) [Confirmed] — IEEE MA-L
- Registry address
- C3 Floor, Software Park, No. 219, Tianhua Second Road, Chengdu Tianfu Avenue, High-Tech Zone, Chengdu, CN 610041 [Confirmed] — IEEE oui.csv (both 9C:54:40 and D0:A0:D6); corroborated by uic.io and udger.com
- Parent / corporate identity
- Chengdu subsidiary and largest R&D base of TD Tech (鼎桥通信技术有限公司), founded 2005 as a Nokia (51%) / Huawei (49%) joint venture [Confirmed] — techwireasia.com, td-tech.com
- Ownership change
- Nokia exited the JV in 2023–2024, selling its stake to a consortium including state-owned Chengdu Gaoxin Jicui Technology Co., Chengdu Hi-Tech Investment Group, and Huagai Capital; TD Tech is now effectively Huawei-aligned and state-linked [Confirmed] — techwireasia.com, developingtelecoms.com, huaweicentral.com
- Device types
- industry-customized terminals (incl. rebranded Huawei-design smartphones such as the M40 5G on MediaTek silicon), 5G/4G enterprise wireless and private LTE/NR, IoT and energy-IoT gateways; verticals include public security, digital government, transportation, energy, airports, ports, smart grids [Confirmed] — td-tech.com, techwireasia.com, cbinsights.com
- Company status
- active [Confirmed] — td-tech.com
- Allocated date
- Unknown — IEEE publishes no registration dates for MAC/OUI assignments; none is present in the registry CSV. [Confirmed-absent] — IEEE oui.csv
- Security context
- No CVEs, advisories, or KEV entries found naming Chengdu TD Tech or its products. No direct BIS Entity List / CISA entry for "Chengdu TD Tech" found in this pass. Huawei is on the U.S. BIS Entity List (since May 2019), and Nokia's exit transferred effective control to Huawei plus Chengdu state-owned entities — so material ownership risk exists. No exploit/backdoor evidence specific to these OUI prefixes. [Confirmed for absence of direct findings; Likely for Huawei-affiliation risk framing] — commerce.gov (2019 Huawei addition), scmp.com, huaweicentral.com
- Analyst note
- A 9C:54:40 or D0:A0:D6 address identifies professional/industrial TD Tech hardware, not consumer devices. Treat with Huawei-family caution in regulated environments; OUI alone does not confirm a backdoor or a specific advisory.