Demant A/S — 2 prefixes (MA-L)

A MAC address starting with 00:19:8E or 00:F8:71 belongs to Demant A/S, a Danish hearing-healthcare group, and most plausibly appears on hearing aids or diagnostic-audiology instruments from its Oticon, Bernafon, Sonic, or Interacoustics brands rather than general consumer networking gear.

Demant A/S (renamed from William Demant Holding A/S in March 2019) is a Nasdaq Copenhagen-listed conglomerate founded in 1904, headquartered at Kongebakken 9, Smørum 2765, Denmark, with roughly 20,000-23,000 employees and over DKK 19 billion in annual revenue. It holds two full IEEE MA-L /24 blocks, 00:19:8E and 00:F8:71, both registered to that same corporate address — not sub-allocations of any shared IEEE base.

No source ties either prefix to a specific product model by name. The corroboration is indirect, via the registrant's business: Demant's core lines are hearing aids (Oticon, Bernafon, Sonic) and diagnostic-audiology instruments (Interacoustics, Amplivox, Grason-Stadler, MAICO, Audioscan, MedRx), and Oticon's own documentation confirms its modern hearing aids use Bluetooth Low Energy for pairing with phones, ConnectClip accessories, and streamers.

A related but distinct legal entity, Demant Enterprise A/S, holds a separate pair of MA-L blocks (84:49:EE, 98:D9:3D) tied to the now-divested EPOS enterprise-audio brand; that entity is covered by its own repo entry, not this one. IEEE's public the IEEE MA-L registry publishes no registration date for either prefix, so any "date registered" shown by third-party lookup tools is a database artifact, not an IEEE fact.

As of an August 2026 search, no CVE or device-level security advisory is recorded in the NVD tied specifically to these two OUI blocks or to Oticon/Bernafon/Sonic hardware. Demant's parent group suffered a widely reported 2019 ransomware incident, but that hit enterprise IT systems, not device firmware carrying these MAC prefixes.

IEEE assignment

2 prefixes (00:19:8E, 00:F8:71) → Demant A/S, Kongebakken 9, Smørum 2765, DK [Confirmed] — the IEEE MA-L registry 00198E, the IEEE MA-L registry 00F871

Registry / block size

MA-L (24-bit OUI); both are full /24 blocks (~16.7M addresses each) [Confirmed] — the IEEE MA-L registry. No matching Demant entry found in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (MA-S).

HQ / country

Kongebakken 9, Smørum 2765, Denmark (DK) [Confirmed] — the IEEE MA-L registry 00198E, the IEEE MA-L registry 00F871; corroborated at https://uic.io/en/mac/vendor/demant_as/

Company status

active, Nasdaq Copenhagen-listed, founded 1904 [Confirmed] — https://en.wikipedia.org/wiki/Demant, https://www.demant.com/

Device types

hearing aids and diagnostic-audiology instruments (Oticon, Bernafon, Sonic, Interacoustics, Amplivox, Grason-Stadler, MAICO, Audioscan, MedRx) [Confirmed company product lines; Likely as device-to-OUI link] — https://en.wikipedia.org/wiki/Demant, https://www.demant.com/

Wireless connectivity note

Oticon's modern hearing aids use Bluetooth Low Energy (Made-for-iPhone certified) to pair with phones, ConnectClip accessories, and streamers [Likely] — https://www.oticon.com/professionals/hearing-solutions/connectivity, https://www.oticon.com/support/pairing

Verified prefixes (both MA-L, Demant A/S)

00:19:8E, 00:F8:71 [Confirmed] — the IEEE MA-L registry 00198E, the IEEE MA-L registry 00F871; corroborated at https://uic.io/en/mac/vendor/demant_as/

No IEEE date

IEEE public OUI data (Registry, Assignment, Organization Name, Organization Address) publishes NO registration date. Third-party scrapers (maclookup.app) report "03 September 2006" for 00:19:8E and "17 November 2015" for 00:F8:71 — these are database artifacts, NOT IEEE facts.

[Confirmed] — https://maclookup.app/search/result?mac=00:19:8E:00:00:00, https://maclookup.app/search/result?mac=00:F8:71:00:00:00

Related vendors

Demant Enterprise A/S (separate legal entity, same Kongebakken 9 address; holds 84:49:EE and 98:D9:3D — NOT included here) [Confirmed] — /mac/vendor/demant-enterprise-as/; EPOS (former enterprise-audio brand under Demant Enterprise A/S, divested to ACCO Brands 2024-2025)

[Confirmed] — https://www.hearingtracker.com/pro-news/demant-sells-epos-to-acco-brands-to-focus-fully-on-hearing-healthcare

Security note

no CVE or device-level advisory found tied to 00:19:8E or 00:F8:71 as of an August 2026 search; the 2019 Demant ransomware incident hit enterprise IT, not device firmware on these prefixes [Likely] — https://securityaffairs.com/91959/security/demant-ransomware-attack.html

Analyst note

a globally-administered Demant A/S OUI on 00:19:8E or 00:F8:71 identifies genuine hardware from this legal entity, most plausibly hearing-aid or diagnostic-audiology equipment given Demant's product lines; no per-model confirmation exists, so treat the device-class link as an inference rather than a confirmed match.