Shenzhen YOUHUA Technology Co., Ltd — 44 prefixes (MA-L)

Shenzhen YOUHUA Technology Co., Ltd (widely operating under the brand YouhuaTech / 友华通信, full Chinese name 深圳市友华通信技术有限公司) holds 44 distinct MA-L (24-bit) OUI assignments in the cached IEEE registry — no MA-M or MA-S blocks were found for the same org string, so this vendor is an MA-L-only registrant. That block count alone rules out the "single-OUI shell" pattern this project abstains on, and independent web research corroborates a real, operating company behind the registrations rather than a bare IEEE filing. Chinese company-registry sources describe the company as founded in 2012 with registered capital of RMB 21,000,000, headquartered at the Shenzhen University-town Business Incubator Park in Nanshan District — an address that matches the IEEE-registrant address on file almost exactly ("Room 407 Shenzhen University-town Business Park, Lishan Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong 518055, China"). The company manufactures telecom-grade network terminal equipment: GPON/EPON/XGPON optical modems, WiFi 6/7 home gateways, 5G CPE, set-top boxes, cameras, and switches, sold primarily to telecom operators for consumer broadband deployments — a typical OEM/ODM pattern for a mid-tier Chinese carrier-equipment supplier. Chinese industry press ranks it among "top-10 optical-modem brands" for 2025, alongside larger names like Huawei, ZTE, and Fiberhome, positioning it as a real but not top-tier market participant. Independent English-language sources add further corroboration: device.report documents a consumer router model (WR350) attributed to this vendor, and router-network.com documents default-login behavior for consumer Youhua WiFi routers (e.g. WR1200JS) — confirming these OUIs sit on genuine consumer/home-networking hardware, not shell registrations. No CVEs, security advisories, or notable exploit/botnet activity were found for this vendor's devices in this pass; one unconfirmed, non-authoritative detail from Chinese consumer forums describes methods for obtaining elevated "super password" access on some Youhua GPON ONT web UIs, a pattern common to carrier-locked CPE generally but not tied to a disclosed CVE here.

IEEE assignment

44 prefixes → Shenzhen YOUHUA Technology Co., Ltd, registered Shenzhen, Guangdong, CN [Confirmed] — IEEE MA-L (local cached registry)

Registry / block size

MA-L (24-bit OUI) only; 44 confirmed prefixes in cached the IEEE MA-L registry; no matches in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (MA-S) for the same org string [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Registered address

Room 407 Shenzhen University-town Business Park, Lishan Road, Taoyuan Street, Nanshan District, Shenzhen, Guangdong, CN 518055 (two of 44 rows — assignments A42940, C4047B — show a shortened variant omitting "Room 407"/"Nanshan District"; treated as a registry formatting artifact for the same registrant, not a distinct address)

[Confirmed] — the IEEE MA-L registry

Company identity (independent corroboration)

深圳市友华通信技术有限公司 / Shenzhen Youhua Communication Technology Co., Ltd (brand YouhuaTech), founded 2012, registered capital RMB 21,000,000, address matches the IEEE registrant address [Likely] — https://www.shenzhenware.com/company/55513338, https://en.youhuatech.com/

Device types / usage context

GPON/EPON/XGPON optical modems, WiFi 6/7 home gateways, 5G CPE, set-top boxes, cameras, switches, sold mainly to telecom operators for consumer broadband; ranked among "top-10 optical-modem brands" (2025) in Chinese industry press

[Likely] — https://en.youhuatech.com/products/list-6.html, https://www.cnpp.cn/china/list_10284.html

Consumer hardware corroboration

documented consumer router model WR350 and WR1200JS with published default-login behavior, confirming genuine home-networking devices rather than shell registrations [Likely] — https://device.report/shenzhen-youhua-technology/wr350, https://router-network.com/youhua-router-login

Sample OUI prefixes (MA-L, this vendor)

90:12:34, 28:D1:B7, DC:A3:33, 68:A6:82, 54:66:6C, 44:7B:BB, 14:B8:37, A4:29:40, 54:B2:9D, D8:02:8A [Confirmed] — the IEEE MA-L registry

Registration date

Unknown — IEEE's public OUI registry publishes no assignment/registration date field; any third-party "date registered" value (e.g. from maclookup.app) is a database artifact, not an IEEE fact, and is not recorded here

[Confirmed — absence itself] — the IEEE MA-L registry (no date column present); maclookup.app dates explicitly excluded as non-authoritative

IANA Reference

not applicable — this is an IEEE MA-L (link-layer OUI) registry entry, not an IANA protocol/RFC registry entry; field intentionally left blank [Confirmed]

Security context

no CVEs, advisories, or authoritative (NVD/CISA/vendor PSIRT) exploit reporting found in this pass; unconfirmed Chinese-forum mentions of "super password" bypass methods on some GPON ONT models (PT923/PT924) noted but not treated as a disclosed vulnerability

[Unknown] — https://www.acwifi.net/7838.html, https://blog.csdn.net/panyong2010/article/details/141373678

Company status

active [Likely] — https://en.youhuatech.com/