IEEE 1904.1 Working Group — 3 prefixes (MA-L)

These three MA-L blocks (90:82:60, 58:D0:8F, C4:E0:32) are registered not to a commercial hardware vendor but to the IEEE 1904.1 Working Group — the IEEE standards body responsible for IEEE Std 1904.1, the "Standard for Service Interoperability in Ethernet Passive Optical Networks (SIEPON)." All three share one identical registry address, 1351 Redwood Way, Petaluma, CA 94954, which is the IEEE Registration Authority's own address rather than a distinct corporate headquarters. SIEPON defines system-level interoperability for EPON access equipment used in FTTH/FTTB and cellular-backhaul optical access networks: OAM, multicast/LLID handling, QoS/CoS, equipment and service management, and power-saving. The working group's own site (grouper.ieee.org/groups/1904/) publishes an "Identifier Assignments" section that explicitly lists OUI codes it manages alongside EtherType and eOAM branch codes for the standard, which corroborates that these OUIs are protocol/standards-identifier allocations tied to the SIEPON specification — reserved or example address space used within the standard's OAM and interoperability framework — not addresses burned into a shipped consumer product line. No specific commercial device, product line, or hardware model could be tied to any of these three prefixes; treat a match on one of them as "SIEPON standards-body identifier space," not as a vendor device fingerprint.

IEEE assignment

3 MA-L prefixes → IEEE 1904.1 Working Group, registered 1351 Redwood Way, Petaluma, CA 94954, US [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI), 3 blocks; no MA-M or MA-S (oui36) assignments found for this registrant [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Verified prefixes (all MA-L, IEEE 1904.1 Working Group)

90:82:60, 58:D0:8F, C4:E0:32 [Confirmed] — IEEE MA-L

HQ / country

1351 Redwood Way, Petaluma, CA 94954, US — this is the IEEE Registration Authority's own registry address, not a distinct corporate HQ [Confirmed] — IEEE MA-L

Organization type

IEEE standards working group (IEEE 1904 Access Networks Working Group), maintaining IEEE Std 1904.1 SIEPON — not a commercial hardware vendor [Confirmed] — https://standards.ieee.org/ieee/1904.1/4768/, https://grouper.ieee.org/groups/1904/

Standard / usage context

IEEE Std 1904.1 "Standard for Service Interoperability in Ethernet Passive Optical Networks (SIEPON)"; OUIs documented under the working group's "Identifier Assignments" (OUI codes, EtherType, eOAM branch codes) as protocol/standards-identifier space

[Likely] — https://grouper.ieee.org/groups/1904/, https://grouper.ieee.org/groups/1904/4/tf4_home.shtml

Device types

none identified — no shipped consumer/enterprise product or model could be tied to these prefixes; consistent with standards-identifier allocation rather than a manufacturer [Likely] — WebSearch pairing the specific hex OUIs with "1904.1 Working Group"; no device/product references found

Company status

the underlying standard/working group is an active IEEE standards effort; no commercial company status applies [Likely] — https://standards.ieee.org/ieee/1904.1/4768/

Registration date

Unknown — IEEE publishes no OUI assignment/registration dates. Third-party aggregator (maclookup.app) shows "registered 26 July 2010", "updated 17 November 2015", and per-OUI 2013-01-09 dates; these are database/crawl artifacts, NOT IEEE facts, and are deliberately not recorded as the entry's registration date

[Confirmed] — https://maclookup.app/vendors/ieee-1904-1-working-group

IANA reference

not applicable / blank — no IANA RFC reference exists for OUI registry entries; not fabricated [Confirmed] — IEEE MA-L

Analyst note

A match on 90:82:60 / 58:D0:8F / C4:E0:32 indicates IEEE 1904.1 (SIEPON) standards-identifier space, not a specific vendor device. Do not treat these prefixes as a commercial-vendor device fingerprint.