Hamamatsu Photonics K.K. — 3 prefixes (MA-L / MA-S)

A MAC address starting with 24:BF:74 or 00:90:06 identifies hardware from Hamamatsu Photonics K.K., a Japanese manufacturer of optical sensors, photomultiplier tubes, and scientific imaging systems headquartered in Hamamatsu City, Shizuoka Prefecture. A third assignment, the narrower 8C:1F:64:67:F0/36 sub-block, also belongs to Hamamatsu — but only that specific slice; the wider 8C:1F:64 base is a shared IEEE Registration Authority pool held by many unrelated registrants.

Founded in 1953, Hamamatsu Photonics is a substantive, product-bearing company rather than a bare registration — it manufactures photomultiplier tubes, image sensors, laser diodes, and camera systems through its Electron Tube, Solid State, Systems, and Laser Group divisions, with subsidiaries in the US (Hamamatsu Corporation, Bridgewater NJ) and Europe (Hamamatsu Photonics Europe GmbH).

Hamamatsu's ORCA-series scientific CMOS cameras support GigE Vision (Gigabit Ethernet) interfaces, and the company publishes a dedicated GigE troubleshooting guide for these products — plausible, non-definitive evidence that the registered blocks serve networked laboratory and scientific-imaging equipment rather than consumer networking gear. No source maps a specific prefix to a named camera model.

IEEE's public OUI data publishes no assignment or registration date for any of these three blocks; any "date registered" shown by third-party MAC-lookup tools is a database artifact, not an IEEE fact. As of an August 2026 search, no CVE, security advisory, or malware association was found for Hamamatsu Photonics K.K. or these prefixes in NVD or general web search.

IEEE assignment

3 prefixes → Hamamatsu Photonics K.K., registered Hamamatsu-City / Iwata, Shizuoka-ken, JP [Confirmed] — the IEEE MA-L registry 24BF74, 009006; the IEEE MA-S registry 8C1F6467F

Registry / block size

two MA-L (24-bit) blocks — 24:BF:74, 00:90:06 — plus one MA-S (36-bit) sub-block, 8C:1F:64:67:F0/36 [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

HQ / country

Japan; registrant addresses cluster in Hamamatsu-City and Iwata, Shizuoka Prefecture [Confirmed] — the IEEE MA-L registry 24BF74, 009006; the IEEE MA-S registry 8C1F6467F

Company status

active — founded 1953, ongoing manufacturer with US and European subsidiaries [Confirmed] — en.wikipedia.org/wiki/Hamamatsu_Photonics

Device types

optical sensors, photomultiplier tubes, image sensors, laser diodes, scientific/laboratory imaging systems [Confirmed] — hamamatsu.com

Notable products

ORCA-series scientific CMOS cameras with GigE Vision (Gigabit Ethernet) interfaces [Likely] — hamamatsu.com GigE interface troubleshooting guide, hamamatsu.com C13440-20CU product page

Verified sample prefixes

24:BF:74 (MA-L), 00:90:06 (MA-L), 8C:1F:64:67:F0/36 (MA-S) [Confirmed] — the IEEE MA-L registry 24BF74, 009006; the IEEE MA-S registry 8C1F6467F

Shared-base note

8C:1F:64 is an IEEE Registration Authority base sub-allocated to many unrelated registrants beneath the /24; Hamamatsu's holding is limited to the 8C:1F:64:67:F0/36 sub-block and does not extend to the base [Confirmed] — the IEEE MA-S registry 8C1F6467F

Registration dates

Unknown — IEEE's public OUI data (the IEEE MA-L registry / the IEEE MA-S registry) publishes no assignment/registration date; third-party "date registered" fields are database artifacts, not IEEE facts [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

IANA reference

Unknown — no IANA RFC reference recorded for these registry entries [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

Security context

no CVE, security advisory, or malware/trojan association found for Hamamatsu Photonics K.K. or these prefixes as of an August 2026 search [Likely] — panorays.com/free-security-reports/hamamatsu-photonics-k-k/

Related vendors

Hamamatsu Corporation (US subsidiary, Bridgewater NJ) and Hamamatsu Photonics Europe GmbH (European subsidiary) — same parent company, not confirmed as separate OUI registrants [Likely] — hamamatsu.com

Analyst note

24:BF:74, 00:90:06, and the 8C:1F:64:67:F0/36 sub-block identify Hamamatsu Photonics hardware; do not treat the wider 8C:1F:64 base as Hamamatsu-owned — it is a shared IEEE RA pool with many unrelated registrants beneath it [Confirmed] — the IEEE MA-S registry 8C1F6467F