HMS Industrial Networks — 6 prefixes (MA-L)

A MAC address beginning with a prefix like 00:30:56 or 00:05:94 belongs to HMS Industrial Networks (HMS Networks), a Swedish manufacturer of industrial communication hardware, typically found on embedded fieldbus and industrial-Ethernet connectivity modules, remote-access IIoT gateways, and industrial switches rather than end-user consumer devices.

HMS Industrial Networks AB, founded in 1988 and headquartered in Halmstad, Sweden, holds six confirmed MA-L OUI blocks in the IEEE registry. Five — 00:03:27, 00:05:94, 00:30:11, 00:30:56, and 9C:B2:06 — are registered to "HMS Industrial Networks" at the Halmstad address.

The sixth, CC:3F:1D, is registered separately to "HMS Industrial Networks SLU," the company's Spanish subsidiary based in Igualada, Barcelona. Holding six distinct OUI blocks under two related legal entities is a strong signal of a substantive, active manufacturer rather than a bare shell registration.

The product portfolio spans several brands: Anybus embedded fieldbus and industrial-Ethernet communication modules that OEMs build into their own equipment, Ewon remote-access and IIoT gateways, Intesis building-automation protocol gateways, Ixxat and PEAK System CAN/vehicle-bus interfaces, and N-Tron/Red Lion industrial switches, HMI, and controllers.

HMS maintains an active vulnerability-disclosure program. CISA has published ICS advisory ICSA-24-193-20 for CVE-2024-6558, a CVSS 6.3 flaw in the Anybus-CompactCom 30 embedded webserver, and HMS itself has issued advisories covering Anybus/InterNiche stack vulnerabilities (2022) and a Log4Shell exposure notice touching Anybus products (2021).

IEEE assignments

six MA-L prefixes — 00:03:27, 00:05:94, 00:30:11, 00:30:56, 9C:B2:06 (HMS Industrial Networks, Halmstad SE), CC:3F:1D (HMS Industrial Networks SLU, Igualada ES) [Confirmed] — the IEEE MA-L registry

Registry / block size

MA-L only (24-bit OUI); no MA-M or MA-S registrations found for HMS under any spelling searched [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Primary address

P O Box 4126, Halmstad, Halland, SE 300 04, Sweden (5 of 6 blocks; minor whitespace/formatting variance between rows is a raw-data artifact) [Confirmed] — the IEEE MA-L registry

Secondary address

Milà i Fontanals 7, Igualada, Barcelona, ES 08700, Spain — CC:3F:1D block only, registrant "HMS Industrial Networks SLU" [Confirmed] — the IEEE MA-L registry

Registration dates

Unknown for all six blocks — IEEE MA-L publishes no assignment/registration date in the source registry; none should be attributed to IEEE [Confirmed] — the IEEE MA-L registry

Company status

active; founded 1988, Halmstad, Sweden; ~1,100 employees; SEK 3,577M 2025 revenue; operates in 20+ countries [Confirmed] — https://www.hms-networks.com/about-us

Device types / brands

Anybus, Ewon, Intesis, Ixxat, PEAK System, N-Tron, Red Lion [Confirmed] — https://www.hms-networks.com/about-us

Security context

CVE-2024-6558 (Anybus-CompactCom 30 embedded webserver, CVSS 6.3) with CISA ICS advisory ICSA-24-193-20; HMS-published advisories for Anybus/InterNiche stack vulnerabilities (2022) and an Anybus Log4Shell exposure notice (2021)

[Likely] — https://www.cisa.gov/news-events/ics-advisories/icsa-24-193-20, https://www.hms-networks.com/cybersecurity

Ewon RCE (CVE-2026-25823)

listed by a third-party vulnerability database, not independently cross-checked against a primary NVD/CISA record in this pass [Unknown] — https://www.sentinelone.com/vulnerability-database/cve-2026-25823/