Active Power — 00:30:A5 (MA-L)

The OUI 00:30:A5 belongs to "ACTIVE POWER," registered at 11525 Stonehollow Ste #255, Austin, TX 78758, US, as a single MA-L (24-bit) block in the IEEE registry. Active Power is not a networking-equipment vendor — it designs and manufactures flywheel-based uninterruptible power supply (UPS) systems under the CLEANSOURCE brand, using kinetic energy stored in a spinning flywheel as an alternative to chemical battery banks. The company was founded in 1992 as Magnetic Bearing Technologies, rebranded to Active Power in 1996, and was acquired in late 2016 by Piller Power Systems Inc., a subsidiary of Langley Holdings PLC; manufacturing continues in Austin, Texas. The reason a power-systems maker holds an IEEE OUI is its embedded network-management hardware: CLEANSOURCE UPS units expose Ethernet management interfaces supporting SNMP and Modbus TCP for integration with building-management systems, and the OUI identifies the NIC inside those critical-power appliances rather than any routing or switching gear. For asset classification, a 00:30:A5 MAC therefore flags an industrial UPS management interface — a critical-infrastructure device class — not consumer or network-core equipment. No CVEs specific to Active Power hardware were found; network-managed UPS devices are a known attack surface in general (SNMP misconfiguration, unpatched management firmware), but those are class-level concerns, not Active Power-specific advisories. As with all OUI work, note that IEEE publishes no registration date for MAC blocks; any "date registered" shown on third-party lookup sites (e.g. the "November 9, 2000" on maclookup.app) is a database artifact, not an IEEE-sourced fact.

IEEE assignment

00:30:A5 → ACTIVE POWER, registered Austin, TX, US [Confirmed] — IEEE MA-L; maclookup.app

Registry / block type

MA-L (24-bit OUI) [Confirmed] — IEEE the IEEE MA-L registry; maclookup.app

Registry address

11525 Stonehollow Ste #255, Austin, TX 78758, US [Confirmed] — IEEE the IEEE MA-L registry

Company / vendor name

Active Power (legacy Magnetic Bearing Technologies 1992 → Active Power 1996) [Confirmed] — en.wikipedia.org/wiki/Active_Power; activepower.com/about

Company status

active brand; acquired late 2016 by Piller Power Systems Inc. (Langley Holdings PLC); ~100 employees; still manufacturing in Austin, TX [Confirmed] — en.wikipedia.org/wiki/Active_Power; piller.com/history

Industry

critical/backup power systems — flywheel-based UPS (CLEANSOURCE brand) [Confirmed] — activepower.com/about

Device types

industrial UPS / critical-power appliances with embedded Ethernet management interfaces (SNMP, Modbus TCP) for BMS integration — NOT networking infrastructure [Confirmed] — activepower.com/product/cleansource-xt-mms; activepower.com/product/cleansource-plus-mms

Primary use sectors

data centers, healthcare, industrial/manufacturing, broadcast, military/defense, financial, transportation, gaming facilities [Confirmed] — activepower.com/about

Security context

CLEANSOURCE UPS units expose SNMP/Modbus TCP management; no Active Power-specific CVEs located. Class-level concern only: network-connected UPS devices are a critical-infrastructure attack surface (SNMP misconfig, unpatched management firmware) — not vendor-specific findings.

[Likely] — activepower.com/product/cleansource-xt-mms

Vendor website

https://www.activepower.com/ [Confirmed] — activepower.com

No-IEEE-date note

IEEE publishes no MAC/OUI registration date. Third-party "November 9, 2000" (maclookup.app) is a database artifact, not an IEEE fact. [Confirmed] — maclookup.app

IANA reference

none applicable (vendor OUI entry, no IANA protocol/port/service reference) [Confirmed] — n/a

Analyst note

a 00:30:A5 MAC identifies an Active Power UPS network-management interface (critical-power appliance), not core networking gear; useful for flagging industrial/critical-infrastructure assets in inventory.