Komatsu Ltd. — 2 prefixes (MA-L)

A MAC address beginning 00:C0:6F or CC:3F:8A belongs to Komatsu Ltd., the Japanese construction and mining equipment manufacturer, and most likely marks embedded networking hardware on Komatsu machinery — such as an engine control unit or a telematics reporting terminal — rather than general-purpose computing or networking equipment.

Komatsu holds two confirmed IEEE MA-L (Organizationally Unique Identifier, Large) assignments, both registered to the same Hiratsuka, Kanagawa Prefecture address. That consistency across two separate blocks, rather than a single isolated registration, is one signal that this is a substantive, active vendor rather than a shell registration.

Komatsu itself is well documented: founded in 1921, publicly traded on the Tokyo Stock Exchange (6301), and the world's second-largest maker of construction and mining equipment. Its KOMTRAX telematics system places network-connected monitoring and reporting hardware on Komatsu machines, which is the most plausible device context for these OUIs, though no source maps either prefix to a specific model.

No CVE, CISA/ICS-CERT advisory, or other documented security incident tied to either prefix or to Komatsu's connected equipment was found as of an August 2026 search. That is a sourced absence of a public record, not a clearance claim — it should not be read as proof the equipment has no issues.

IEEE assignment

CC:3F:8A, 00:C0:6F → KOMATSU LTD., registered 3-25-1, Shinomiya Hiratsuka-Shi Kanagawa-Ken JP 254-8555 [Confirmed] — the IEEE MA-L registry CC3F8A, the IEEE MA-L registry 00C06F

Registry / block size

MA-L (24-bit OUI); two IEEE blocks assigned (~33.5M addresses total) [Confirmed] — the IEEE MA-L registry CC3F8A, the IEEE MA-L registry 00C06F. NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); the "1998-04-22" (00:C0:6F) and "2021-06-16" (CC:3F:8A) dates shown by maclookup.app are third-party database artifacts, not IEEE facts.

HQ / country

3-25-1, Shinomiya, Hiratsuka-shi, Kanagawa-ken, JP 254-8555; Japan [Confirmed] — the IEEE MA-L registry CC3F8A, the IEEE MA-L registry 00C06F

Company status

active, publicly traded (Tokyo Stock Exchange: 6301), founded 1921 [Confirmed] — https://en.wikipedia.org/wiki/Komatsu_Limited

Device types

likely engine control units and telematics/reporting terminals (e.g. KOMTRAX) on Komatsu heavy equipment; no source confirms a specific device model per prefix [Likely] — https://www.komatsu.com/en-us/services-and-support/equipment-monitoring-and-analysis/telematics

Notable products

KOMTRAX equipment-monitoring telematics system — confirmed as a Komatsu product, not confirmed as tied to either specific OUI [Likely context, not a per-prefix confirmation] — https://www.komatsu.com/en-us/services-and-support/equipment-monitoring-and-analysis/telematics

Verified prefixes (both MA-L, KOMATSU LTD.)

00:C0:6F, CC:3F:8A [Confirmed] — the IEEE MA-L registry 00C06F, the IEEE MA-L registry CC3F8A; https://maclookup.app/vendors/komatsu-ltd

Shared-base check

neither prefix falls within a known IEEE-RA shared/sub-allocated base (e.g. 70:B3:D5, 8C:1F:64); both are standard MA-L /24 blocks assigned solely to KOMATSU LTD. [Confirmed] — the IEEE MA-L registry 00C06F, the IEEE MA-L registry CC3F8A

Security context

no CVE, CISA/ICS-CERT advisory, or documented incident tied to either prefix or to Komatsu network-connected equipment found as of an August 2026 search [Unknown, sourced negative] — https://www.cisa.gov/news-events/ics-advisories

Analyst note

a Komatsu OUI reliably identifies Komatsu-manufactured equipment hardware; the specific device class (engine control unit vs. telematics terminal) is not resolvable from the OUI alone, and no security issue is on record for either prefix as of an August 2026 search.