Elma Electronic — 2 prefixes (MA-L)

A MAC address starting with D0:47:C1 or 94:F2:78 belongs to Elma Electronic, and most likely identifies an embedded or rugged Ethernet switch, router, or single-board-computer network interface rather than a consumer device. Elma builds electronic packaging and embedded-computing hardware for defense/aerospace, industrial-automation, transportation, telecom, medical, and broadcast deployments.

IEEE's public the IEEE MA-L registry records two separate MA-L (24-bit) assignments under the Elma Electronic name: D0:47:C1 to Elma Electronic AG (Hofstrasse 93, Wetzikon, Zuerich, Switzerland) and 94:F2:78 to Elma Electronic (44350 S. Grimmer Blvd, Fremont, CA, US). Independent web sources corroborate these are the same corporate group — Elma Electronic AG is the Swiss parent (publicly traded on the SIX exchange as ELMN), and Elma Electronic Inc. is its US subsidiary, founded in Fremont, CA in 1985.

Elma's product line includes backplanes, chassis and cabinet platforms, enclosures, embedded boards (single-board computers, storage modules, carriers/adapters, FPGAs), power supplies, and rotary switches, plus a dedicated "Ethernet Switches" line — VPX/OpenVPX, SOSA, VME/VME64x, CompactPCI, and XMC/PMC form-factor Layer 2/3 switches running at 1/10/25/40/100 Gigabit Ethernet, managed through a proprietary "Switchware" application.

A separate company, Elma Trenew Electronic GmbH (Pforzheim, Germany), holds a third MA-L block, 00:14:DB. Despite the similar name, sourced research found no corporate link between it and Elma Electronic AG/Inc., so 00:14:DB is excluded from this entry. No CVE is recorded in the NVD and no CISA ICS advisory was found for Elma Electronic as of an August 2026 search — a sourced negative finding, not proof of a clean record.

IEEE assignment (Switzerland)

D0:47:C1 → Elma Electronic AG, Hofstrasse 93, Wetzikon, Zuerich, CH 8620 [Confirmed] — the IEEE MA-L registry D047C1

IEEE assignment (US)

94:F2:78 → Elma Electronic, 44350 S. Grimmer Blvd, Fremont, CA, US 94538 [Confirmed] — the IEEE MA-L registry 94F278

Registry / block size

MA-L (24-bit OUI) for both assignments; no MA-M or MA-S sub-allocation exists for any Elma Electronic entity [Confirmed] — the IEEE MA-L registry D047C1, the IEEE MA-L registry 94F278, the IEEE MA-M registry (search: elma, no match), the IEEE MA-S registry (search: elma, no match)

Company status

active, publicly traded parent (SIX: ELMN) [Confirmed] — https://stockanalysis.com/quote/swx/ELMN/company/

Corporate relationship

Elma Electronic Inc. (Fremont, CA) is the North American subsidiary of Elma Electronic AG (Wetzikon, Switzerland), founded 1985 [Likely] — https://en.wikipedia.org/wiki/Elma_Electronic, https://www.elma.com/en/contacts/locations

Device / product types

embedded Ethernet switches (VPX/OpenVPX/CompactPCI/VME/XMC/PMC), backplanes, chassis/cabinet platforms, enclosures, embedded boards/SBCs, power supplies, rotary switches [Confirmed] — https://products.elma.com/collections/ethernet-switches, https://en.wikipedia.org/wiki/Elma_Electronic

Distinct unrelated company caution

00:14:DB is registered to "Elma Trenew Electronic GmbH" (Pforzheim, Germany), a separately-named entity with no confirmed corporate tie to Elma Electronic AG/Inc.; excluded from this entry's prefix set [Confirmed] — the IEEE MA-L registry 0014DB

Registration dates

IEEE's the IEEE MA-L registry publishes no assignment/registration date for either prefix (columns are Registry, Assignment, Organization Name, Organization Address only); third-party aggregator maclookup.app shows database-artifact dates (17 Feb 2021 for D0:47:C1, 17 Nov 2015 for 94:F2:78) that are not IEEE facts

[Confirmed] — the IEEE MA-L registry D047C1, the IEEE MA-L registry 94F278

Security record

no CVE listed in the NVD and no CISA ICS advisory found for Elma Electronic as of an August 2026 search [Likely — negative finding, absence of a public advisory does not confirm absence of vulnerabilities] — https://nvd.nist.gov (search: Elma Electronic, no results, checked August 2026), https://www.cisa.gov/advisories (search: Elma Electronic, no results, checked August 2026)

Related vendors

Elma Trenew Electronic GmbH (separate company, not a subsidiary — see caution above) [Confirmed]; Elma Bustronic (Fremont, CA subsidiary founded 1990, per company history) [Likely] — https://en.wikipedia.org/wiki/Elma_Electronic