Shenzhen SDG DONZHI Technology Co., Ltd — 14:F5:92 (MA-L)

OUI 14-F5-92 is registered as an IEEE MA-L block to Shenzhen SDG DONZHI Technology Co., Ltd, a broadband customer-premises-equipment (CPE) manufacturer headquartered in the Nanshan District technology cluster of Shenzhen, Guangdong, China. The registry address — 1001 SDG Information Technology Building, No.2 Qiongyu Road, Science Park Community, Yuehai Street — places it inside the SDG Group campus; DONZHI is a subsidiary of the publicly listed SDG Group (Shenzhen SDG Information Co., Ltd., Shenzhen Stock Exchange code 000070). The company's hardware is carrier-grade access equipment built on an OEM/ODM model: PON optical network units and terminals (EPON/GPON SFU and MDU), ADSL2/2+ and VDSL modems, wireless home gateways and routers, and IPTV/OTT set-top boxes, shipped largely under ISP and integrator brand labels rather than the DONZHI name. Its self-reported corporate profile cites founding in 2004, roughly 1,600 employees, and annual production on the order of 9 million PON units and 8 million IPTV units (2015-era figures). For network-classification work the value of this prefix is that a device presenting 14:F5:92 is an SDG-DONZHI-manufactured access device — but because the ODM model ships firmware under downstream ISP brands, vulnerability tracking and patch lifecycle for any given unit usually live under the carrier's label, not DONZHI's. No CVE or named security incident was found attributed specifically to DONZHI-branded devices; the ISP-CPE category at large (ONU/ONT, DSL modems, home gateways) has been a frequent target of IoT botnet campaigns, so absence of a named CVE is not a clean bill of health.

IEEE assignment

14-F5-92 (MA-L) → Shenzhen SDG DONZHI Technology Co., Ltd [Confirmed] — IEEE MA-L (cached enrichment/registries/oui.csv line 601); udger.com MAC vendor record

Registry / block size

MA-L (24-bit OUI; ~16.7M addresses); single match across oui.csv, mam.csv, oui36.csv [Confirmed] — enrichment/registries/oui.csv. NOTE: IEEE public OUI data publishes NO assignment/registration date (columns are Registry, Assignment, Organization Name, Organization Address only); any "date registered" on third-party MAC tools is a database artifact, not an IEEE fact.

Registry address / country

1001 SDG Information Technology Building, No.2 Qiongyu Road, Science Park Community, Yuehai Street, Nanshan District, Shenzhen, Guangdong, CN 518000 [Confirmed] — IEEE MA-L registry row; udger.com

Parent / corporate status

subsidiary of SDG Group (Shenzhen SDG Information Co., Ltd.), Shenzhen Stock Exchange code 000070; DONZHI active [Confirmed/Likely] — donzhi.cn; corporate profile (SlideShare). Parent listing is single-sourced from the corporate profile presentation [Likely].

Founded

2004 (company self-reported corporate profile) [Likely] — SlideShare "Donzhi Company Profile". This is a corporate founding year, NOT an IEEE OUI registration date.

Device types

PON ONU/ONT (EPON/GPON SFU + MDU), ADSL2/2+ and VDSL modems, wireless home gateways/routers, IPTV/OTT set-top boxes, RFID devices; carrier-grade CPE on OEM/ODM model [Confirmed] — donzhi.cn; corporate profile. Cited integration partners: Huawei, ZTE, H3C, Ruijie, Skyworth, Fiberhome.

Production scale

~9M PON ONU/ONT units/yr and ~8M IPTV/OTT units/yr; ~1,600 employees; ~31,000 sq m manufacturing area; ~$180M annual sales (2015 figures) [Likely] — corporate profile (SlideShare); single-sourced, 2015-dated.

Certifications

ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2001, RoHS, CE, CCC, UL; "national hi-tech enterprise" designation (2012) [Likely] — corporate profile (SlideShare); single-sourced.

Security context

No CVE or named incident found specifically attributed to DONZHI-branded devices [Confirmed — as of June 2026 search]. Category risk: ISP-deployed CPE (ONU/ONT, DSL modems, home gateways) is broadly targeted by IoT botnets (Mirai-class, Flax Typhoon/Raptor Train), but no DONZHI-specific attribution found. ODM/OEM shipping means firmware vulns are often tracked under the ISP's brand, not DONZHI's. [Confirmed] — bleepingcomputer.com (Flax Typhoon); media.defense.gov CSA on PRC-linked botnet

Vendor site

http://www.donzhi.cn/ [Likely] — DNS resolves and the domain is corroborated as the official site by multiple sources; direct fetch returned ECONNREFUSED at research time, so liveness is unverified.

Analyst note

A device with OUI 14:F5:92 is SDG-DONZHI-manufactured access hardware. For asset/threat tracking, identify the downstream ISP/integrator brand the unit actually ships under — that is where firmware versioning and any advisories will live.