ACUSON Computed Sonography — 00:C0:C3 (MA-L)

The OUI 00:C0:C3 is registered to "ACUSON COMPUTED SONOGRAPHY" at 1220 Charleston Road, Mountain View, CA — the historic address of Acuson Corporation, the diagnostic-ultrasound pioneer founded in Mountain View in 1979 (incorporated 1981) by Dr. Samuel H. Maslak and fellow ex-Hewlett-Packard engineers. "Computed Sonography" is Acuson's own trademark for the software-driven, 128-channel beam-forming architecture it introduced with the Acuson 128 system in 1983, not an IEEE-assigned descriptor — the brand simply carried over into the company's OUI registration. Acuson was acquired by Siemens AG for roughly $700 million in 2000 and now operates as the Acuson brand within Siemens Healthineers (Erlangen, Germany), where current products include the Acuson Origin, Sequoia, and Redwood. A MAC address under this prefix therefore identifies a network interface in Acuson/Siemens medical ultrasound equipment — devices that sit on hospital networks and speak DICOM to PACS image archives. That clinical context matters for anyone classifying this OUI on a network: these are PHI-bearing imaging endpoints, and the device class has a documented attack surface (DICOM exposure, legacy-OS advisories such as Siemens ICSMA-17-215-02, and broad HHS/HC3 PACS warnings), so an Acuson prefix on an unsegmented or internet-reachable host is worth flagging. IEEE publishes no registration date for this or any OUI, so none is asserted.

IEEE assignment

00:C0:C3 → ACUSON COMPUTED SONOGRAPHY, 1220 Charleston Road, Mountain View, CA, US 94039-7393 [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); single block; not present in MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) [Confirmed] — IEEE the IEEE MA-L registry

Registration date

none — IEEE publishes NO assignment/registration date for OUI/MAC prefixes (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any third-party "date registered" is a database artifact, not an IEEE fact [Confirmed] — IEEE the IEEE MA-L registry

Vendor / company

Acuson Corporation, Mountain View, CA — acquired by Siemens AG (~$700M, 2000); now the Acuson brand within Siemens Healthineers [Confirmed] — ob-ultrasound.net, fundinguniverse.com, diagnosticimaging.com

Company founding

founded 1979 (per ob-ultrasound.net) / incorporated 1981 (per FundingUniverse); founders Dr. Samuel H. Maslak, Robert Younge, Amin Hanafy (ex-Hewlett-Packard); first product shipped 1983 [Confirmed; founding/incorporation year differs by source — range stated] — ob-ultrasound.net, fundinguniverse.com

"Computed Sonography"

Acuson's own trademark for its software-driven 128-channel beam-forming architecture, introduced with the Acuson 128 (1983); it is product branding that predates the OUI assignment, NOT an IEEE-assigned label [Confirmed] — ob-ultrasound.net, siemens-healthineers.com

Device types

medical diagnostic ultrasound imaging systems (e.g. Acuson 128/XP era; modern Origin, Sequoia, Redwood) [Confirmed] — siemens-healthineers.com

Network use

Ethernet-connected; supports DICOM image transfer to hospital PACS (published DICOM Conformance Statements for P300, SC2000, Sequoia). Specific NIC/chipset behind the legacy 00:C0:C3 interfaces is not publicly documented

[Likely] — Acuson P300 DICOM Conformance Statement (siemens cdn), providianmedical.com

Company status

active brand under Siemens Healthineers (Erlangen, Germany) as of 2026; current products include Acuson Origin (FDA-cleared 2024/2025) [Confirmed] — siemens-healthineers.com, accessdata.fda.gov

Security context

PHI-bearing imaging device class with a documented attack surface — DICOM/PACS exposure (CVE-2019-11687 DICOM-as-PE; unauthenticated DICOM servers), legacy-Windows advisories (Siemens ICSMA-17-215-02 / SSA-822184, Aug 2017), and HHS/HC3 PACS warnings. No Acuson-specific CVE found in the Siemens Healthineers advisory portal as of this pass. Mitigations: network segmentation, VLAN isolation, firewall/VPN restriction of DICOM ports, prompt patching [Confirmed for device class; no Acuson-specific CVE] — healthcareinfosecurity.com, hhs.gov, siemens-healthineers.com/cybersecurity

Analyst note

a 00:C0:C3 address reliably points at Acuson/Siemens ultrasound hardware on a hospital network; treat it as a clinical imaging endpoint and verify it is segmented, not internet-reachable.