Sonova AG / Sonova Consumer Hearing GmbH — 5 prefixes (MA-L)

A MAC address beginning with one of five prefixes registered to Sonova AG or its subsidiary Sonova Consumer Hearing GmbH belongs to a Sonova-brand device, typically a Bluetooth-enabled hearing aid or a related wireless hearing accessory rather than general computing or networking gear.

Sonova AG, headquartered in Stäfa, Switzerland, is a large, publicly known hearing-care group — reported at roughly CHF 3,627M revenue and about 17,990 employees as of 2024 — and one of the largest hearing-aid makers worldwide. It owns well-known brands including Phonak, Unitron, Advanced Bionics, AudioNova, and the Sennheiser consumer-audio line, which together give the OUIs concrete device context beyond a bare registration.

Four of the five blocks (70:66:1B, 2C:53:D7, 80:28:3C, D8:A4:69) sit under Sonova AG at its Stäfa registry address; the fifth (80:C3:BA) is registered separately to Sonova Consumer Hearing GmbH in Wedemark, Germany, a Sonova subsidiary. Holding five distinct MA-L blocks across two related legal entities is itself a substance signal — vendors with multiple OUI assignments are rarely shell registrations.

Documented real-world usage points to Phonak-brand Bluetooth-streaming hearing aids (an FDA MAUDE adverse-event record for the Phonak Audeo Lumity line confirms wireless hardware in the field) and Roger wireless receivers, used with cochlear-implant speech processors following Sonova's acquisition of Advanced Bionics. These devices commonly pair with companion apps such as myPhonak. No CVE or vendor security advisory specific to Sonova/Phonak Bluetooth hearing-aid hardware was found in this pass; general Bluetooth LE MAC-tracking literature exists but is not Sonova-specific and is not treated as a finding here.

Vendor

Sonova AG (4 OUI blocks) and Sonova Consumer Hearing GmbH, a Sonova subsidiary (1 OUI block) [Confirmed] — the IEEE MA-L registry (lines 2801, 24436, 24618, 30492, 31606)

Prefixes

70:66:1B, 2C:53:D7, 80:28:3C, D8:A4:69 (Sonova AG); 80:C3:BA (Sonova Consumer Hearing GmbH) [Confirmed] — the IEEE MA-L registry

Registry / block type

MA-L (24-bit OUI), 5 blocks total across the two entities [Confirmed] — the IEEE MA-L registry

Primary address

Laubisruetistrasse 28, Stäfa, CH 8712, Switzerland [Confirmed] — the IEEE MA-L registry

Secondary address

Am Labor 1, Wedemark, Niedersachsen, DE 30900, Germany (Sonova Consumer Hearing GmbH) [Confirmed] — the IEEE MA-L registry (line 24436)

Device class

Bluetooth-enabled hearing aids and hearing-related wireless accessories [Likely] — accessdata.fda.gov MAUDE record for Phonak Audeo Lumity; sonova.com

Notable brands

Phonak, Unitron, Advanced Bionics, AudioNova, Sennheiser (consumer audio) [Confirmed] — en.wikipedia.org/wiki/Sonova

Notable products

Phonak Audeo Lumity hearing aids; Roger wireless receivers for cochlear-implant speech processors; myPhonak companion app [Likely] — accessdata.fda.gov MAUDE record; play.google.com/store/apps/details?id=com.sonova.phonak.dsapp

Company status

Active, publicly traded; ~CHF 3,627M revenue and ~17,990 employees as of 2024 [Confirmed] — en.wikipedia.org/wiki/Sonova

Registration dates

Unknown — IEEE's public OUI data (Registry, Assignment, Organization Name, Organization Address) does not include an assignment or registration date field [Confirmed] — the IEEE MA-L registry structure

Security context

No CVE or vendor advisory found specific to Sonova/Phonak Bluetooth hearing-aid hardware in this research pass [Unknown] — general web search, no vendor-specific result

IEEE assignments

70661B, 2C53D7, 80283C, D8A469 → Sonova AG; 80C3BA → Sonova Consumer Hearing GmbH [Confirmed] — the IEEE MA-L registry (lines 2801, 24436, 24618, 30492, 31606)

Registry / block size

MA-L (24-bit OUI); 5 total blocks across the two entities [Confirmed] — the IEEE MA-L registry

HQ / country

Laubisruetistrasse 28, Stäfa, CH 8712, Switzerland (Sonova AG registry address) [Confirmed] — the IEEE MA-L registry

Secondary entity address

Am Labor 1, Wedemark, Niedersachsen, DE 30900, Germany (Sonova Consumer Hearing GmbH) [Confirmed] — the IEEE MA-L registry (line 24436)

Company status

active, publicly traded hearing-care group [Confirmed] — en.wikipedia.org/wiki/Sonova

Device types

Bluetooth-enabled hearing aids, cochlear-implant wireless accessories [Likely] — accessdata.fda.gov MAUDE record; sonova.com

Notable products

Phonak Audeo Lumity hearing aids, Roger wireless receivers, myPhonak companion app [Likely] — accessdata.fda.gov MAUDE record; play.google.com

Verified prefix set (all MA-L)

70:66:1B, 2C:53:D7, 80:28:3C, D8:A4:69, 80:C3:BA [Confirmed] — the IEEE MA-L registry

Registration dates

Unknown — IEEE OUI registry publishes no assignment/registration date field [Confirmed] — the IEEE MA-L registry structure (no date column)

Related brands

Phonak, Unitron, Advanced Bionics, AudioNova, Sennheiser (consumer-audio division) [Confirmed] — en.wikipedia.org/wiki/Sonova

Analyst note

Multi-OUI, cross-entity registration plus concrete documented device/product context (FDA-listed hearing aids, cochlear-implant accessories) supports treating this as a substantive vendor, not a shell registration.