ABB Power Systems Power Generation — B8:9B:E4 (MA-L)

B8:9B:E4 is an IEEE MA-L (24-bit OUI) block registered to "ABB Power Systems Power Generation" at 29801 Euclid Ave, Wickliffe, Ohio 44092, US. That address is ABB's historic Wickliffe engineering campus, long the global hub for its Symphony Plus distributed control system (DCS) and System 800xA control platforms used in power plants, and for its UNITROL excitation and synchronization products (automatic voltage regulators such as the UNITROL 1000/1010 line), several of which ship Ethernet-connected variants. That business context makes it likely — though not documented in any product-to-OUI mapping — that this block covers Ethernet-networked industrial power-generation and control equipment (DCS I/O, turbine and excitation controllers) rather than being a bare paper registration. ABB is a Swiss-headquartered multinational (ABB Ltd / ABB Inc.) in industrial automation and power technology, and it holds many other distinct MAC-prefix registrations under related legal-entity names — e.g. ABB Industrial Systems AB (00:00:23), ABB AB Cewe-Control (00:0C:62), ABB Switzerland Ltd Power Systems — consistent with a large firm registering separate blocks per division and site. A registry data-quality caveat applies: a separate, unrelated MA-L block 00:90:4F is assigned to "ABB POWER T&D COMPANY, INC." in Allentown, PA — a different prefix and different legal name that must not be conflated with the B8:9B:E4 entry. As always with OUIs, IEEE publishes no assignment date; third-party "registration date" values seen for this prefix are database-scrape artifacts, not IEEE facts.

IEEE assignment

B8:9B:E4 → ABB Power Systems Power Generation [Confirmed] — IEEE MA-L (RA REST API: services13.ieee.org, registry=MA-L&text=B89BE4); cross-checked macvendorlookup.com

Registry / block size

MA-L (24-bit OUI; ~16.8M addresses) [Confirmed] — IEEE MA-L; the IEEE MA-L registry

Registry presence

found in the IEEE MA-L registry (MA-L) only; NOT present in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (MA-S) [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

29801 Euclid Ave, Wickliffe, Ohio 44092, US (registry address; ABB's historic Wickliffe engineering campus) [Confirmed] — IEEE MA-L; new.abb.com newsroom (Wickliffe facility)

Company status

active — ABB Ltd / ABB Inc., Swiss-headquartered industrial automation & power technology multinational [Confirmed] — new.abb.com

Device types

industrial power-generation / control equipment — Symphony Plus DCS, System 800xA control systems, UNITROL excitation & synchronization (AVR) products [Likely] — inferential from registrant business unit + Wickliffe site; new.abb.com/control-systems/symphony-plus, new.abb.com/power-electronics/excitation-and-synchronization. No public source ties the specific hex B8:9B:E4 to a named product model.

Registration date

none published — IEEE publishes NO assignment/registration date for OUI/MA-L blocks. Third-party tools (e.g. maclookup.app) show "Initial registration 27 May 2014 / most recent update 17 Nov 2015" for this prefix; those are database crawl/index artifacts, NOT IEEE facts, and must not be recorded as authoritative registration dates.

[Confirmed] — maclookup.app (artifact); IEEE the IEEE MA-L registry has no date column

Related OUIs (same parent, different legal entities)

ABB Industrial Systems AB (00:00:23), ABB AB Cewe-Control (00:0C:62), ABB Switzerland Ltd Power Systems [Confirmed] — maclookup.app/vendors/abb; IEEE MA-L

Security context

no CVE, CISA/ICS-CERT advisory, or abuse report was found tied specifically to this OUI or to "ABB Power Systems Power Generation" devices in a search pass. (General ABB ICS product lines have had CISA advisories over the years, but none was found tied to this specific block.) Treat as Unknown / not found, not as a clean negative.

[Unknown] — search pass, no matching source

Data trap

00:90:4F → "ABB POWER T&D COMPANY, INC." (Allentown, PA) is a DIFFERENT, unrelated MA-L registration; do not conflate with B8:9B:E4. [Confirmed] — the IEEE MA-L registry

Analyst note

A globally-administered B8:9B:E4 address identifies genuine ABB-registered hardware for asset classification; device-type linkage to specific product models is inferential and OUI alone should not be treated as a product identifier.