Aeonsemi, Inc. — B8:02:A4 (MA-L)

Aeonsemi, Inc. holds a single IEEE MA-L block, B8:02:A4, registered under a Cayman Islands corporate address (Cassia Court, Suite 716, 10 Market Street, Camana Bay, Grand Cayman KY1-9006). Despite the offshore registration on the OUI record, Aeonsemi is a substantive, identifiable fabless semiconductor company — its operating headquarters is in Santa Clara, California, a common pattern for VC-backed chip startups incorporated offshore for financing reasons. The company designs analog, mixed-signal, and DSP integrated circuits for communication, industrial, and automotive networking rather than finished consumer devices. Its named product lines include ChronoPHY (multi-rate 10G Ethernet PHY chips spanning 100 Mbps to 10 Gbps), Arcadium (CMOS silicon oscillator/timing ICs, with a stated 10M+ units shipped), and Nemo (a multi-gigabit automotive Ethernet / MGBASE-T1 chipset targeting robotics and autonomous-vehicle "Physical AI" applications). Because these are chip-level components — Ethernet PHYs and timing ICs embedded inside OEM equipment — the OUI most plausibly surfaces inside broadband access gear and industrial/automotive Ethernet nodes rather than on a branded end-user product. Company substance is well corroborated: disclosed funding of roughly $36.5M across rounds (investors including Sequoia Capital, IDG Capital, Walden International, Susquehanna, and Pacven Walden Management), a live corporate site, a DigiKey distributor listing, and standard company-tracker coverage (PitchBook, Crunchbase, CB Insights). Only one OUI block was located in this pass; no MA-M, MA-S, or IAB assignment for Aeonsemi was found.

IEEE assignment

B8:02:A4 → Aeonsemi, Inc. [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); single block located this pass [Confirmed] — IEEE MA-L. 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); any "date registered" shown on third-party tools (uic.io, maclookup.app, etc.) is a database artifact, not an IEEE fact, and is not recorded here.

Registry address

Cassia Court, Suite 716, 10 Market Street, Camana Bay, Grand Cayman KY1-9006 (Cayman Islands legal/holding address on the OUI record) [Confirmed] — IEEE MA-L

Operating HQ / country

Santa Clara, CA, US (operating headquarters; distinct from the Cayman registration address) [Confirmed] — aeonsemi.com/company

Company status

active [Confirmed] — aeonsemi.com

Industry

fabless semiconductor (analog / mixed-signal / DSP IC design) [Confirmed] — aeonsemi.com/company

Device / product context

chip-level components (Ethernet PHYs, timing/oscillator ICs) embedded in OEM communication, industrial, and automotive-networking equipment — not finished consumer devices [Confirmed] — aeonsemi.com

Product lines

ChronoPHY (multi-rate 10G Ethernet PHY, 100 Mbps–10 Gbps), Arcadium (CMOS silicon oscillator/timing ICs, 10M+ units shipped), Nemo (multi-gigabit automotive Ethernet / MGBASE-T1 chipset) [Confirmed] — aeonsemi.com

Company substance

funded, active fabless design house (~$36.5M raised; investors incl. Sequoia Capital, IDG Capital, Walden International, Susquehanna, Pacven Walden Management); DigiKey distributor listing; PitchBook / Crunchbase / CB Insights coverage — substantive, not a bare single-OUI shell

[Confirmed] — pitchbook.com, crunchbase.com/organization/aeonsemi, digikey.com/en/supplier-centers/aeonsemi-inc

MA-M / MA-S / IAB assignments

none found for Aeonsemi in the IEEE MA-M registry or the IEEE MA-S registry (the oui36 'Aeon' substring hit at line 3175 is an unrelated org, "KAEONIT," MA-S, Marseille FR — coincidental) [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

Security / abuse context

Unknown — targeted searches for Aeonsemi tied to OUI/MAC security issues, CVEs, or abuse reports returned nothing specific; consistent with a component-level chip vendor embedded inside OEM gear rather than a directly internet-facing device brand [Unknown] — no sourced findings

Analyst note

A B8:02:A4 address identifies hardware carrying an Aeonsemi IC (PHY or timing chip), which will typically be an OEM's device rather than an Aeonsemi-branded product; the vendor name identifies the silicon supplier, not the finished-product maker.