Cosonic — 2 prefixes (MA-L)

The "cosonic" vendor slug resolves to two distinct but related Dongguan, Guangdong (China) entities, each holding its own IEEE MA-L (24-bit OUI) block in the cached registry. F0-AE-66 is registered to "Cosonic Intelligent Technologies Co., Ltd." (Songshan Lake National High-tech Industrial Development Zone, Dongguan, CN 523808), and 2C-BA-CA is registered to "Cosonic Electroacoustic Technology Co., Ltd." (Shipai Town, Dongguan, CN 523331). Both are facets of the same consumer-audio business — a large Chinese OEM/ODM whose listed arm trades on the Shenzhen Stock Exchange as SHE:300793. Cosonic's core output is wireless audio: Bluetooth headphones, TWS earphones, bone-conduction earphones, gaming headsets, smart speakers, and a growing line of smart wearables (watches, glasses, AI-translation and heart-rate earphones). They manufacture on an OEM/ODM basis for brands including Philips, JBL, Beats, Honor, Huawei, 1More, and Soundcore, and in 2025 moved to acquire German premium-audio brand Beyerdynamic. For network classification, a MAC drawn from either block seen on a network is almost certainly a Bluetooth audio peripheral — a headphone, earphone, or speaker — paired to a nearby host rather than an infrastructure device. No Cosonic-specific CVEs or security advisories were found; standard Bluetooth-peripheral caveats apply, and whether any Cosonic device ships an affected Bluetooth SoC (e.g. the 2025 Airoha advisories) is unconfirmed. As with all OUI data, neither IEEE CSV publishes a registration date, so no allocation date is recorded here.

IEEE assignment (entry 1)

F0-AE-66 → Cosonic Intelligent Technologies Co., Ltd., Songshan Lake National High-tech Industrial Development Zone, Dongguan, Guangdong, CN 523808 [Confirmed] — IEEE MA-L (oui.csv local cache)

IEEE assignment (entry 2)

2C-BA-CA → Cosonic Electroacoustic Technology Co., Ltd., No.151 Shipai Section, Dongyuan Avenue, Shipai Town, Dongguan, Guangdong, CN 523331 [Confirmed] — IEEE MA-L (oui.csv local cache); corroborated by maclookup.app (https://maclookup.app/macaddress/2CBACA)

Registry / block size

both MA-L (24-bit OUI, ~16.77M addresses each); neither appears in mam.csv (MA-M) or oui36.csv (MA-S) [Confirmed] — IEEE registry caches

HQ / country

Dongguan, Guangdong, China (both entities; two different Dongguan addresses) [Confirmed] — IEEE MA-L

No IEEE date

IEEE publishes NO assignment/registration date for OUI/MAC blocks (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address). A "27 June 2023" date shown on maclookup.app for 2C-BA-CA is a third-party database artifact, not an IEEE fact, and is NOT recorded. [Confirmed] — IEEE oui.csv schema; maclookup.app (https://maclookup.app/macaddress/2CBACA)

Company status

active; listed arm trades as SHE:300793 (Shenzhen Stock Exchange) [Confirmed] — stockanalysis.com (https://stockanalysis.com/quote/she/300793/company/)

Company background

consumer-audio OEM/ODM; founding ~1991 (Electroacoustic/Electronics arm), Cosonic Intelligent Technologies incorporated 2013 and SHE-listed; HQ Dongguan; ~1,500–4,500 employees (sources differ by entity/year) [Likely] — stockanalysis.com, made-in-china.com (https://tangzhilin00.en.made-in-china.com/)

Device types

Bluetooth headphones, TWS earphones, bone-conduction earphones, wireless/gaming headsets, smart speakers, portable Bluetooth speakers; also smart wearables (watches, glasses, AI-translation & heart-rate earphones, VR/AR) and smart chargers [Confirmed] — globalsources.com (https://www.globalsources.com/cosonic-electronics/homepage_6008824813631.htm), made-in-china.com

OEM/ODM customers

manufactures for Philips, JBL, Beats, Honor, Huawei, 1More, Soundcore [Likely] — made-in-china.com, globalsources.com

Corporate action

June 2025 agreement to acquire German premium-audio brand Beyerdynamic (~€122M) [Likely] — ecoustics.com (https://www.ecoustics.com/news/cosonic-acquires-beyerdynamic/)

Vendor site

no standalone verified corporate .com; Made-in-China profile https://tangzhilin00.en.made-in-china.com/ and contact fragment http://cosonic.28.com.cn/ [Likely] — made-in-china.com

Security context

no Cosonic-specific CVEs found. Whether Cosonic devices use Airoha Bluetooth SoCs affected by the 2025 advisories (CVE-2025-20700/20701/20702 — unauthenticated audio interception, flash dump, Link Key extraction across multiple audio brands) is Unknown; no Cosonic-branded device appears in those disclosures. [Likely] — cybersecuritynews.com (https://cybersecuritynews.com/bluetooth-headphones-vulnerabilities/)

IANA reference

none — no IANA RFC reference applies to OUI/MAC vendor entries; field left blank [Unknown] — N/A

Analyst note

a MAC from F0-AE-66 or 2C-BA-CA seen on a network is almost certainly a Bluetooth audio peripheral (headphone/earphone/speaker) paired to a nearby host, not infrastructure; treat as a consumer accessory with standard Bluetooth-peripheral security caveats.