Hosiden Corporation — 3 prefixes (MA-L)

Hosiden Corporation holds three IEEE MA-L OUI blocks — 30:31:7D, 00:0B:E4, and D0:09:F5 — all registered to the same address in Yao, Osaka, Japan (the 00:0B:E4 row carries a slightly abbreviated form of the same physical location). Hosiden is a long-established Japanese electronic-components maker, founded in 1950 and listed on the Tokyo Stock Exchange (ticker 6804). Its product line spans connectors, switches, acoustic transducers (microphones, speakers, receivers), touch panels, display components, automotive parts, and — most relevant to network identity — OEM Bluetooth and BLE wireless modules sold under FCC grantee code VIY (e.g. the HRM1062, HRM1079, HRM1085, and HRM1086 modules, all 2402–2480 MHz, approved for embedding in host devices only). Because Hosiden is a Tier-1 component supplier rather than a consumer brand, a MAC address bearing a Hosiden OUI is almost always an embedded Bluetooth subsystem inside another manufacturer's end-product — consumer electronics, automotive infotainment, or industrial IoT — rather than a device sold under the Hosiden name. From a security standpoint, no CVEs or NVD CPE records exist for Hosiden as a vendor; the exposure of any Hosiden-bearing device depends on the host integrator's firmware and pairing implementation, not on Hosiden itself. A Hosiden OUI is therefore a device-type hint (Bluetooth-capable embedded hardware), not a threat signal. As with all MAC prefixes, IEEE publishes no registration date for these blocks; any "date registered" shown by third-party lookup tools is a database artifact, not an IEEE fact.

IEEE assignment

3 prefixes (30:31:7D, 00:0B:E4, D0:09:F5) → Hosiden Corporation, Yao, Osaka, JP [Confirmed] — IEEE MA-L (https://regauth.standards.ieee.org/standards-ra-web/pub/view.html#registries)

Registry / block size

MA-L (24-bit OUI) on all three assignments; not present in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (MA-S) [Confirmed] — IEEE registry (local cached the IEEE MA-L registry)

HQ / country

4-33, Kitakyuhoji 1-chome, Yao, Osaka, JP 581-0071 (registry address on 30:31:7D and D0:09:F5; the 00:0B:E4 row gives "4-33 Yao-city, Osaka, JP 581-0071" — same physical location, abbreviated). Country: Japan (JP) [Confirmed] — IEEE MA-L; corporate HQ Yao, Osaka per en.wikipedia.org/wiki/Hosiden

Company status

active; founded 1950-09-14; listed on the Tokyo Stock Exchange, ticker 6804 [Confirmed] — hosiden.com/en/, en.wikipedia.org/wiki/Hosiden

Device types

OEM Bluetooth/BLE wireless modules, connectors, switches, acoustic transducers (microphones, speakers, receivers), capacitive touch panels, display components, automotive switches/connectors, IoT modules [Confirmed] — hosiden.com/en/product.html

Wireless modules tied to OUI usage

FCC grantee code VIY; module models HRM1062 (BLE), HRM1079 (BLE), HRM1085 (Bluetooth), HRM1086 (Bluetooth Dual), all 2402–2480 MHz, approved for OEM/host-device embedding only [Confirmed] — fccid.io/VIYHRM1085, fccid.io/VIYHRM1062, fccid.io/VIYHRM1079, fccid.io/VIYHRM1086

Industries served

telecommunications, automotive, consumer electronics, audio/visual, industrial IoT; Tier-1 component supplier whose modules ship inside other OEMs' end-products [Confirmed] — hosiden.com/en/product.html, en.wikipedia.org/wiki/Hosiden

Security context

no CVEs and no NVD CPE records for "hosiden" (0 results); no public security advisories identified. Exposure of a Hosiden-bearing device depends on the host integrator, not on Hosiden [Confirmed] — nvd.nist.gov/products/cpe/search (keyword "hosiden")

Registration date

Unknown — IEEE publishes NO assignment/registration date for MA-L/MA-M/MA-S OUI blocks; the IEEE MA-L registry has no date column, and third-party "date registered" values are database artifacts, not IEEE facts [Confirmed] — IEEE registry schema

Analyst note

A Hosiden OUI on a globally-administered address indicates an embedded Bluetooth/wireless subsystem inside another brand's product, not a Hosiden-branded consumer device. Useful as a device-type classifier (Bluetooth-capable embedded hardware); not itself a threat signal.