Hangzhou Huacheng Network Technology Co., Ltd. (Imou) — 5 prefixes (MA-L)

A MAC address beginning with 90:6A:94, 1C:4D:89, A8:31:62, 30:24:50, or AC:3D:FA belongs to Hangzhou Huacheng Network Technology Co., Ltd., the Chinese manufacturer behind the Imou consumer-IoT and security-camera brand — most often seen on Wi-Fi IP cameras, smart locks, and baby/maternal-care monitors rather than general-purpose networking gear.

The IEEE MA-L registry lists all five blocks under this registrant across two registered addresses: 90:6A:94 at Room 412, Building 2, No. 2930 Nanhuan Road, Binjiang District, Hangzhou, and the other four at 13th Floor, Building 3, No. 582 Liye Road, Changhe Street, Binjiang District, Hangzhou. The company holds no MA-M or MA-S (OUI-36) sub-allocations.

Hangzhou Huacheng was established 30 November 2015 as a subsidiary of Zhejiang Dahua Technology Co., Ltd., one of the world's largest video-surveillance manufacturers, and it operates the Imou brand (formerly "Lechange"). Ownership shifted in 2025: Dahua announced transferring its roughly 32.7% stake, and a July 2025 announcement describes Zhongwei Capital, alongside Chenyi Fund and Tencent, completing acquisition of a controlling stake. The exact current cap table is not fully reconciled across available sources.

Devices tied to these OUIs are consumer IoT/security products under the Imou brand, including Wi-Fi IP cameras (an FCC filing for FCC ID 2AVYF-IPC-F46FE-D uses Dahua/Imou's standard "IPC" model-code convention), smart locks, baby monitors, and "educational robots" per the company's registered business scope.

Imou-branded and sibling Dahua-ecosystem devices have a documented application/firmware CVE history worth flagging for a security audience: CVE-2023-6913 (Imou Life app session-hijacking), CVE-2023-42470 (Imou Life/SmartLifeIoT code-injection), and the earlier CVE-2021-33044/33045 Dahua authentication-bypass pair exploited via Dahua's P2P infrastructure against both Dahua and Imou cameras. None of these bear on the OUI registration itself.

Every "registration date" seen for these OUIs across aggregator sites is a database-scrape artifact, not an IEEE fact — IEEE's public OUI registry publishes no assignment-date field for MAC vendor blocks, so no date-registered value is recorded here.

IEEE assignment

5 MA-L blocks → Hangzhou Huacheng Network Technology Co., Ltd. — 90:6A:94, 1C:4D:89, A8:31:62, 30:24:50, AC:3D:FA, all registered in Binjiang District, Hangzhou, Zhejiang, CN [Confirmed] — IEEE the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI), 5 blocks; none in the MA-M or MA-S (OUI-36) registries [Confirmed] — IEEE the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

two registered addresses under one registrant — Room 412, Building 2, No. 2930 Nanhuan Road, Binjiang District, Hangzhou, Zhejiang, CN 310052; and 13th Floor, Building 3, No. 582 Liye Road, Changhe Street, Binjiang District, Hangzhou, CN 311200 [Confirmed] — IEEE the IEEE MA-L registry

Company status

active; founded as a Zhejiang Dahua Technology Co., Ltd. subsidiary (30 Nov 2015); ownership shifting toward Zhongwei Capital / Chenyi Fund / Tencent-linked investors per a July 2025 announcement (current cap table not fully reconciled across sources)

[Likely] — baike.baidu.com, dahuasecurity.com, zwcpartners.com

Device types

Wi-Fi IP cameras (Imou brand; e.g. FCC ID 2AVYF-IPC-F46FE-D), smart locks, baby/maternal-care monitors, "educational robots" per registered business scope [Likely] — fcc.report, imou.com, baike.baidu.com

Notable products

Imou (formerly Lechange) consumer IoT / smart-home camera line

Verified sample prefixes

90:6A:94, 1C:4D:89, A8:31:62, 30:24:50, AC:3D:FA [Confirmed] — IEEE the IEEE MA-L registry

Registration date

Unknown — the IEEE OUI registry has no date column. Every "registration date" figure found for these OUIs (e.g. one aggregator dates 90:6A:94 to 17 Jun 2021) is a third-party database-scrape artifact, not an IEEE fact; do not display any such figure as an IEEE registration date

[Confirmed] — standards.ieee.org

Security context

Imou-branded / Dahua-ecosystem devices carry a documented app/firmware CVE history — CVE-2023-6913 (session hijacking), CVE-2023-42470 (code injection), CVE-2021-33044/33045 (Dahua P2P auth bypass affecting Dahua and Imou cameras) — application/firmware level, not an OUI-registration finding

[Likely] — nvd.nist.gov, github.com/advisories

Related vendors

Zhejiang Dahua Technology Co., Ltd. (parent at founding; holds separate OUI registrations)

Analyst note

substantive, identifiable company (Imou/Dahua lineage, Tencent-linked 2025 ownership shift, concrete product line with FCC filings, five IEEE-registered MA-L blocks) — not a bare single-OUI shell.