Pioneer Corporation holds four MA-L OUI blocks registered to "PIONEER CORPORATION" in the IEEE registry: 00:E0:36, 74:5E:1C, 94:B2:CC, and E0:6D:18. The registry addresses cluster in Japan — two point to 1-1 Shin-ogura, Kawasaki-shi, Kanagawa (the current HQ-area address), one to 25-1 Yamada, Kawagoe-shi, Saitama (near Pioneer's Kawagoe Plant), and one older block to 2610 Hanazono, Saitama. These prefixes appear chiefly on Pioneer's networked automotive hardware: aftermarket car audio and AV head units (Pioneer and Carrozzeria brands), in-vehicle navigation systems (the AVIC, CYBER NAVI, and AIR NAVI lines), and camera and dash-cam systems, many of which carry CarPlay, Android Auto, Bluetooth, and Wi-Fi. Corporately, Pioneer was founded in 1938, delisted from the Tokyo Stock Exchange in March 2019 after a ~$900 million Baring Private Equity Asia acquisition, passed to EQT, and became a subsidiary of CarUX (part of Taiwan's Innolux Corporation) when that ~USD 1.1 billion acquisition completed on December 1, 2025. The security-relevant note for analysts: NCC Group disclosed a chained zero-day trio in the Pioneer DMH-WT7600NEX aftermarket head unit — CVE-2024-23928, CVE-2024-23929, and CVE-2024-23930 — that together exposed GPS location, Wi-Fi credentials, and call logs; Pioneer patched all three in firmware v3.06, but the update requires manual installation. A Pioneer OUI on a monitored network most likely identifies an aftermarket in-vehicle device, and confirming firmware currency is warranted.
- IEEE assignment
- 4 MA-L prefixes → PIONEER CORPORATION, registered Japan (Kawasaki-shi Kanagawa / Kawagoe-shi & Hanazono Saitama) [Confirmed] — IEEE MA-L (oui.csv lines 740, 3201, 11129, 34684)
- Registry / block size
- MA-L (24-bit OUI; ~16.7M addresses each); 4 blocks (~67M addresses total); none in MA-M (mam.csv) or MA-S (oui36.csv) [Confirmed] — IEEE registries (oui.csv; mam.csv/oui36.csv absence). NOTE: IEEE's public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools (e.g. maclookup.app: 1998-04-22 for 00:E0:36, 2011-03-17 for 74:5E:1C, 2015-11-17 for 94:B2:CC, 2021-10-20 for E0:6D:18) is a database artifact, not an IEEE fact.
- Verified prefixes (all MA-L, PIONEER CORPORATION)
- 00:E0:36, 74:5E:1C, 94:B2:CC, E0:6D:18 [Confirmed] — IEEE oui.csv / maclookup.app
- HQ / country
- 28-8 Honkomagome 2-chome, Bunkyo-ku, Tokyo 113-0021, Japan (corporate HQ); registry blocks list Kawasaki-shi Kanagawa and Saitama (Kawagoe Plant) addresses; country JP [Confirmed] — global.pioneer/en/corp/info/outline/, IEEE MA-L
- Company status
- active; private. Founded 1938; TSE-delisted March 2019 (Baring Private Equity Asia, ~$900M); later EQT; subsidiary of CarUX/Innolux since acquisition completed December 1, 2025 (~USD 1.1B) [Confirmed] — global.pioneer press, eqtgroup.com, prnewswire.com, en.wikipedia.org/wiki/Pioneer_Corporation
- Parent company
- CarUX (subsidiary of Innolux Corporation, Taiwan), effective December 1, 2025; prior owners EQT and Baring Private Equity Asia [Confirmed] — global.pioneer press, digitimes.com
- Device types
- car audio/AV head units (Pioneer, Carrozzeria), in-vehicle navigation (AVIC, CYBER NAVI, AIR NAVI), aftermarket infotainment with CarPlay/Android Auto/Bluetooth/Wi-Fi, automotive cameras and dash cams, AI/HMI in-vehicle platforms, home audio (TAD) [Confirmed] — global.pioneer/en/info/mainbusiness/car
- Notable products
- AVIC navigation series, CYBER NAVI (AR HUD), Carrozzeria car electronics, DMH-WT7600NEX infotainment; Pioneer navigation OEM-fitted in Suzuki FRONX (Japan, Oct 2024) [Confirmed] — global.pioneer press, pioneerelectronics.com
- Security note
- CVE-2024-23928 (CVSS 6.5, improper cert validation), CVE-2024-23929 (CVSS 7.3, arbitrary file injection), CVE-2024-23930 (CVSS 4.3, crash → payload on reboot) — NCC Group chained zero-days in Pioneer DMH-WT7600NEX exposing GPS, Wi-Fi credentials, call logs; patched in firmware v3.06 (manual install). Only publicly known Pioneer-specific CVE chain; general Bluetooth/CarPlay/AirPlay class risks also apply. [Confirmed] — enterprisesecuritytech.com, darkreading.com, oligo.security
- Related vendors
- parent CarUX/Innolux (TW); former parents EQT, Baring Private Equity Asia; OEM partner Suzuki; competitor cluster Sony, Alpine, Kenwood/JVC (car audio/navigation)
- Analyst note
- A Pioneer OUI (00:E0:36, 74:5E:1C, 94:B2:CC, E0:6D:18) identifies Pioneer Corporation automotive hardware — most likely an aftermarket car audio/navigation head unit or networked in-vehicle device. Privately held since 2019, under Innolux/CarUX since Dec 2025. Confirm firmware currency (min v3.06 for DMH-WT7600NEX) for any aftermarket Pioneer head unit on a monitored network.