RuggedCom Inc. — 3 prefixes (MA-L)

A MAC address beginning with 94:B8:C5, 00:0A:DC, or 00:13:D5 belongs to RuggedCom Inc., a Canadian manufacturer of industrial-grade Ethernet switches and serial-to-Ethernet servers built for harsh, critical-infrastructure environments such as electrical substations, rail wayside control, and intelligent transportation systems.

RuggedCom held three IEEE MA-L assignments — two registered to addresses in Concord, Ontario and one in nearby Woodbridge, Ontario — all under variant forms of the same registrant name ("RuggedCom Inc." / "RuggedCom"). The company was a publicly traded (TSX) manufacturer with roughly US$94M in FY2011 revenue and about 360 employees before Siemens AG acquired it in 2012 for roughly C$382M, completing a compulsory buyout of the remaining shares by April 12, 2012.

The flagship product lines — RuggedSwitch and RuggedServer hardware running the vendor's proprietary "Rugged Operating System" (ROS) firmware — continue today under the Siemens RUGGEDCOM brand (RS900, RS8000, i800, RSG2000, RST900, RST2000), rated to IEC 61850-3 and IEEE 1613 for power-utility and transportation deployments. IEEE's registry rows for all three blocks still list the pre-acquisition RuggedCom name and address; IEEE does not require a registry update on corporate acquisition.

ROS-based devices carry a notable security history: CVE-2012-4698, a hard-coded RSA SSL private key embedded in ROS firmware (CVSSv2 9.3), allowed decryption of SSL traffic and device manipulation, and was followed by several further US-CERT/CISA advisories on key-management and password-storage weaknesses. Advisories against Siemens RUGGEDCOM ROS devices continued as recently as 2025, indicating the product line remains actively deployed.

IEEE assignment

3 prefixes → RuggedCom Inc. / RuggedCom, registered Concord & Woodbridge, Ontario, Canada [Confirmed] — IEEE MA-L (the IEEE MA-L registry 94B8C5, 000ADC, 0013D5)

Registry / block size

MA-L (24-bit OUI); holds 3 IEEE prefixes, no evidence of additional blocks [Confirmed] — the IEEE MA-L registry

HQ / country

300 Applewood Crescent, Concord, Ontario, CA L4K 5C7 (2 of 3 blocks); 30 Whitmore Road, Woodbridge, Ontario, CA L4L 7Z4 (1 block) [Confirmed] — IEEE the IEEE MA-L registry 94B8C5, 0013D5, 000ADC

Company status

Acquired — RuggedCom Inc. no longer independent; absorbed into Siemens AG (Siemens Canada Limited) via compulsory acquisition completed 2012-04-12; brand continues as Siemens RUGGEDCOM [Confirmed] — prnewswire.com

Device types

Industrial/rugged Ethernet switches, serial-to-Ethernet servers (RuggedSwitch, RuggedServer) running ROS firmware [Confirmed] — cisa.gov ICSA-12-354-01A, siemens.com

Notable products

RuggedSwitch, RuggedServer; post-acquisition Siemens RUGGEDCOM RS900/RS8000/i800/RSG2000/RST900/RST2000 [Confirmed] — siemens.com

Verified sample prefixes (all MA-L)

94:B8:C5 (RuggedCom Inc., Concord ON), 00:0A:DC (RuggedCom Inc., Woodbridge ON), 00:13:D5 (RuggedCom, Concord ON) [Confirmed] — IEEE the IEEE MA-L registry 94B8C5, 000ADC, 0013D5

Registration dates

Unknown — IEEE's the IEEE MA-L registry schema (Registry, Assignment, Organization Name, Organization Address) publishes no assignment/registration date for any of the 3 blocks; any third-party "date registered" value is a database artifact, not an IEEE fact

[Confirmed] — standards-oui.ieee.org/oui/oui.csv

Security history

CVE-2012-4698, hard-coded RSA SSL private key in ROS firmware (CVSSv2 9.3), publicly disclosed with PoC by Justin W. Clarke (Cylance); followed by ICS-ALERT-12-234-01A (key management), ICSA-12-146-01A (weak password-storage crypto), ICSA-13-340-01; Siemens RUGGEDCOM ROS advisories continue through 2025 (ICSA-22-069-12, ICSA-22-195-18, ICSA-25-294-04)

[Confirmed] — cisa.gov

Shared base status

None of the 3 blocks are sub-allocations of a shared IEEE base (e.g. 70:B3:D5, 8C:1F:64); each is a standard single-company MA-L /24 registered outright to RuggedCom [Confirmed] — the IEEE MA-L registry

Related vendors

Siemens AG / Siemens Canada Limited (acquirer, 2012) [Confirmed] — newswire.ca, prnewswire.com

Analyst note

All 3 RuggedCom OUIs identify genuine RuggedCom / Siemens RUGGEDCOM industrial networking hardware; IEEE's registry was never updated post-acquisition, so a "RuggedCom" hit and a "Siemens RUGGEDCOM" product label refer to the same lineage, not two vendors.