A. Eberle GmbH & Co. KG — EC:FC:55 (MA-L)

The MA-L block EC:FC:55 is registered to A. Eberle GmbH & Co. KG, a mid-sized German instrumentation manufacturer based at Frankenstrasse 160 in Nuremberg (Nürnberg), Bavaria. The company has spent 40-plus years in electrical-grid measurement, power-quality monitoring, and protection technology, which explains why it holds an IEEE OUI at all: its product line is built around network-capable grid instruments that carry onboard NICs. Representative devices include the fixed-install PQI-DA smart and PQI-DE power-quality/energy loggers and the portable PQ-Box 50/150/200 analyzers; the PQI-DA can be ordered with an integrated TCP/IP interface, and the PQ-Box 200 ships with USB, Ethernet, and WLAN data transfer. This is a genuine operating company with a coherent device catalog, not a bare single-OUI shell — the registration maps cleanly onto Ethernet-equipped grid meters that need globally-administered MAC addresses. On the security side, A. Eberle markets several PQI models with User-Rights-Management and role-based access control plus encrypted transmission, and a PIN-lockout that permanently disables a device after 11 failed entries (requiring a factory unlock). No CVEs, default-credential lists, or public abuse reports surfaced in this pass, but CVE/NVD and Shodan were not queried directly, so absence of issues is not asserted — the security posture is tagged Likely rather than Confirmed. Because EC:FC:55 is a globally-administered OUI on grid instrumentation, a MAC beginning with this prefix is a reliable signal of A. Eberle hardware.

IEEE assignment

EC:FC:55 → A. Eberle GmbH & Co. KG [Confirmed] — the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI, /24) [Confirmed] — the IEEE MA-L registry

Registry address

Frankenstrasse 160, Nuernberg, Bavaria, DE, 90461 (reproduced verbatim from the CSV as a single semi-structured string) [Confirmed] — the IEEE MA-L registry

OUI count for this registrant

exactly one block (EC:FC:55); no "Eberle" match in the MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) registries, so this is an MA-L-only assignment [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

No IEEE registration date

IEEE publishes no assignment/registration date for OUI/MA-L entries and the IEEE MA-L registry carries no date column; any third-party "date registered" is a database artifact, not an IEEE fact, and none is recorded here [Confirmed] — the IEEE MA-L registry

Company identity

A. Eberle GmbH & Co. KG, an independent mid-sized company in Nuremberg, Germany, 40+ years in electrical-grid measurement/monitoring and protection technology [Confirmed] — https://www.a-eberle.de/en/

Company status

active [Confirmed] — https://www.a-eberle.de/en/

Device types

network-capable power-quality analyzers/loggers for electrical grids — PQI-DA smart, PQI-DE (fixed energy logger), PQ-Box 50/150/200 (portable analyzers); PQI-DA offers an optional integrated TCP/IP interface, PQ-Box 200 has USB + Ethernet + WLAN [Confirmed] — https://www.a-eberle.de/en/products/power-quality-analyzer-pqi-da-smart/, https://www.a-eberle.de/en/products/mobile-power-quality-analyzer-pq-box-200/, https://www.a-eberle.de/en/products/power-quality-analyzer-pqi-de/

Security posture

PQI-DA smart / PQI-DA / PQI-DE marketed with User-Rights-Management (URM) and role-based access control (RBAC), encrypted transmission, and a PIN-lockout that permanently locks the device after 11 failed PIN entries (factory unlock required) [Likely] — https://www.a-eberle.de/en/products/power-quality-analyzer-pqi-da-smart/, https://www.a-eberle.de/en/products/power-quality-analyzer-pqi-de/, https://www.a-eberle.de/en/products/power-quality-analyzer-pqi-da/

CVE / abuse findings

Unknown — none found, but CVE/NVD, Shodan, and abuse databases were not queried directly in this pass; absence of issues is not asserted [Unknown]

Substance verdict

SUBSTANTIVE — identifiable operating company with a documented, coherent grid-instrumentation product line that plausibly explains the OUI; not a bare single-OUI shell [Confirmed] — https://www.a-eberle.de/en/

Analyst note

a globally-administered MAC starting EC:FC:55 reliably identifies A. Eberle grid instrumentation; the vendor holds a single OUI, so there is no multi-block consolidation here.