Sumitomo Electric Industries, Ltd — 8 prefixes (MA-L)
Summary
- // what this is
- Sumitomo Electric Industries is registered to MAC prefix
08:4E:BFand 7 more in the IEEE OUI database. When a device's MAC address begins with08:4E:BF, that block was registered by Sumitomo Electric Industries — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- 8 corroborated MA-L blocks plus a named, verifiable product line (FTTx/ONU/fusion splicers) clear the bar for company substance beyond a bare IEEE registration; per-prefix device mapping remains unconfirmed.
About this vendor.
Sumitomo Electric Industries, Ltd holds eight distinct MA-L (24-bit OUI) assignments in the IEEE registry, all registered to the same Osaka, Japan address, spanning what a third-party aggregator's per-prefix snapshot dates place from the late 1990s through 2025 — a range that is not being treated as IEEE fact. This is a large, identifiable Japanese electronics and cable manufacturer with an active "Info-communications" business segment covering optical components and modules, fiber-optic cable, fusion splicers, and FTTx access solutions, so the eight-block footprint reads as genuine multi-product-line hardware registration rather than a bare single-OUI shell. A Sumitomo Electric Lightwave datasheet for the FTE6183, a DPoE/MEF-certified optical network unit built for carrier FTTH access, corroborates that at least part of this footprint maps to carrier-grade optical access equipment; the parent company's product lines (fusion splicers, optical modules) plausibly account for the rest, though per-prefix product mapping was not confirmed in this pass. No MA-M or MA-S rows exist for this organization name, and no vendor-specific security advisories or CVEs surfaced.
- IEEE assignment
- 8 distinct MA-L prefixes → "Sumitomo Electric Industries, Ltd", registered Osaka, Japan [Confirmed] — the IEEE MA-L registry
- Registry / block size
- MA-L (24-bit OUI) ×8; no MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) rows found for this org name [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry
- HQ / registry address
- 1-1-3, Shimaya, Konohana-ku, Osaka 554-0024, JP [Confirmed] — the IEEE MA-L registry
- Company status
- active [Confirmed] — https://sumitomoelectric.com/
- Device types
- likely carrier-grade optical access equipment (ONU/ONT for GPON/FTTH) and fiber-installation tooling (fusion splicers, optical modules); per-prefix mapping not confirmed [Likely] — https://sumitomoelectriclightwave.com/wp-content/uploads/2016/01/FTE6183.pdf, https://sumitomoelectric.com/
- Date registered
- Unknown — IEEE's public OUI data (the IEEE MA-L registry) carries no date column and publishes no assignment dates; a third-party aggregator (maclookup.app) surfaces per-prefix "registration dates" (e.g. 1998–2025 range) but these are database artifacts, not IEEE facts, and are not recorded here[Confirmed as correctly withheld] — n/a
- Security context
- no Sumitomo Electric-specific CVEs or verified security advisories found in this light pass; one low-reliability default-credential aggregator page was found but not verified and is not cited as fact [Unknown]
- Related vendors
- Sumitomo Electric Lightwave and Sumitomo Electric Device Innovations appear as separate entries in third-party MAC vendor trackers, consistent with subsidiary brands of the same conglomerate [Likely] — https://maclookup.app/vendors/sumitomo-electric-industries-ltd
- Consolidation precedent
- modeled on the existing multi-OUI vendor-wacom entry (one primary vendor row + one child row per prefix) [Confirmed] — this site's own enrichment records (vendor-wacom rows)
- Analyst note
- eight independently-registered MA-L blocks at one address, corroborated by a named corporate product line (FTTx/ONU/fusion splicers), clears the "verifiable substance beyond the bare IEEE registration" bar for a consolidated vendor entry.