Shanghai Xiaodu Technology Limited — 3 prefixes (MA-L)

A MAC address starting with F4:21:AE, 1C:3B:01, or D4:84:D0 belongs to Shanghai Xiaodu Technology Limited, and is typically seen on Xiaodu-branded smart speakers and smart displays, including in-room voice and room-control panels the company markets for hotels.

Xiaodu Technology began as Baidu's smart-speaker and AI-hardware business unit before being spun off as an independent company in 2020. The Shanghai-registered entity behind these three OUIs is a different legal registrant from "Baidu Online Network Technology (Beijing) Co., Ltd," which holds a separate 7-prefix OUI footprint documented in this repo's Baidu vendor entry. Xiaodu went on to raise a large funding round in January 2023 at roughly a $4.9 billion valuation, with participation from a Chinese state-backed restructuring fund.

All three IEEE registry rows share one address in Shanghai's Pilot Free Trade Zone, which is the strongest signal that this is a genuine multi-OUI hardware vendor rather than a single-block shell registration. No MA-M or MA-S assignments were found under this exact registrant name in the repo's registry files. As of an April 2026 press release, the company still operates and describes itself expanding its "AI+Hotel" product line into Southeast Asia from its Shanghai base.

IEEE's OUI data publishes no registration date for any of the three blocks — the registry carries only Registry, Assignment, Organization Name, and Organization Address columns. An independent device-fingerprint database (GENIANS) separately lists a "DuerOS Xiaodu Audio Speaker" platform tied to this vendor, which corroborates real-world deployment but is that database's own cataloguing date, not an IEEE allocation date. No device-specific CVE or sanctions/entity-list hit for Xiaodu Technology itself was found in this pass; both are negative search results, not confirmation of a clean record.

IEEE assignment

3 prefixes → Shanghai Xiaodu Technology Limited, registered Shanghai, China [Confirmed] — the IEEE MA-L registry F421AE, the IEEE MA-L registry 1C3B01, the IEEE MA-L registry D484D0

Registry / block size

MA-L (24-bit OUI) x3; no MA-M or MA-S assignments found under this exact name [Confirmed] — the IEEE MA-L registry; the IEEE MA-M registry and the IEEE MA-S registry (no matches)

HQ / address

4th Floor Building No.1, No.701 Naxian Road, Pilot Free Trade Zone, Shanghai, China 200000 [Confirmed] — the IEEE MA-L registry (identical across all three rows)

Company status

active as of an April 2026 press release on AI+Hotel Southeast Asia expansion [Likely] — prnewswire.com

Device types

smart speakers, smart displays, AI+Hotel in-room voice/control panels [Likely] — prnewswire.com, genians.com

Notable products

Xiaodu smart speaker line; DuerOS Xiaodu Audio Speaker platform [Likely] — genians.com

Verified sample prefixes (all MA-L, Shanghai Xiaodu Technology Limited)

F4:21:AE, 1C:3B:01, D4:84:D0 [Confirmed] — the IEEE MA-L registry F421AE, the IEEE MA-L registry 1C3B01, the IEEE MA-L registry D484D0

Corporate history

spun off from Baidu's smart-speaker unit in 2020; raised a funding round in January 2023 at roughly a $4.9bn (RMB 35.5bn) valuation with a state-backed fund participating [Likely] — technode.com

IEEE registration dates

not published — IEEE OUI data has no date column (Registry, Assignment, Organization Name, Organization Address only) [Unknown] — the IEEE MA-L registry structure

Related vendors

Baidu Online Network Technology (Beijing) Co., Ltd, a separate registrant documented in /mac/vendor/baidu/ (7 MA-L prefixes); whether Baidu retains equity in the spun-off entity is Unverified [Confirmed registrant separation; Unknown equity relationship] — /mac/vendor/baidu/, technode.com

Security context

no device-specific CVE and no BIS Entity List/sanctions hit found for Xiaodu Technology itself; both are negative search results in this pass, not confirmation of a clean record [Unknown]

Analyst note

three MA-L blocks at one identical Shanghai address indicate a genuine multi-OUI vendor with real product substance (the Xiaodu smart-speaker/AI-hardware line), independently corroborated by a third-party device-fingerprint database — but this is a separate legal registrant from Baidu's own Beijing-registered OUI entity and should not be merged with it.