Accel Semiconductor Corp — 00:1F:81 (MA-L)

The OUI 00:1F:81 is an IEEE MA-L (24-bit) block registered to Accel Semiconductor Corp, at 1F, Main Building, 149 Chun Xiao Road, Shanghai, China 201203. Accel Semiconductor was a fabless analog and mixed-signal SoC designer founded in Shanghai around 2004, whose product line centered on consumer wireless and audio silicon — single-chip Bluetooth, FM transmitters, stereo/audio CODECs, and mobile-phone chipsets — rather than networking or routing infrastructure. The company was acquired by OmniVision Technologies in 2010 (in the same window as Aurora Systems) and is no longer an independent operating entity; third-party trackers list its status as defunct. The practical reading for asset classification: a 00:1F:81 address most plausibly belongs to a consumer wireless or audio device incorporating an Accel SoC (mobile phones, Bluetooth peripherals, FM radios), not enterprise switches, access points, or routers, of which no corroborated instances were found. No CVEs or public vulnerability disclosures are attributable to this vendor or prefix. A common data-quality trap to avoid: some third-party lookup tools display a "2008" date for this OUI — that is a database scrape artifact, not an IEEE-published registration date. IEEE publishes no assignment dates in its public OUI data, so allocated_date stays Unknown by design.

IEEE assignment

00:1F:81 → Accel Semiconductor Corp [Confirmed] — the IEEE MA-L registry (IEEE MA-L); corroborated maclookup.app, cleancss.com

Registry / block size

MA-L (24-bit OUI; single block, ~16.7M addresses) [Confirmed] — IEEE MA-L / maclookup.app

Registered address

1F, Main Building, 149 Chun Xiao Road, Shanghai, China 201203 [Confirmed] — IEEE registry; cleancss.com/mac-lookup/00-1F-81

Country

CN (China) [Confirmed] — IEEE registry; cleancss.com

Allocated date

Unknown — IEEE publishes NO OUI assignment/registration date; any "2008" date on third-party lookup tools is a database artifact, not an IEEE fact. [Unknown by design] — IEEE the IEEE MA-L registry schema (Registry, Assignment, Organization Name, Organization Address only)

Company profile

fabless analog/mixed-signal SoC designer, Shanghai, founded ~2004; products = single-chip Bluetooth, FM transmitters, audio CODECs, mobile chipsets [Confirmed] — cbinsights.com/company/accel-semiconductor-corporation, tracxn.com

Company status

defunct — acquired by OmniVision Technologies in 2010; no independent web presence remaining [Confirmed] — tracxn.com (OmniVision acquisitions), CB Insights ("Dead")

Industry / device types

consumer wireless and audio electronics (Bluetooth audio, mobile phones, FM devices); NOT networking infrastructure. No corroborated networking-device (switch/AP/router) instances on this prefix. [Likely] — CB Insights, Tracxn product profile

Security context

no CVEs, public vulnerability disclosures, or known incidents specific to Accel Semiconductor Corp or 00:1F:81; risk not independently assessable given defunct status and consumer-only profile [Unknown] — no source found

Website

Unknown — no live vendor site; absorbed into OmniVision in 2010 [Confirmed absence]

Analyst note

a 00:1F:81 address most plausibly identifies a consumer Bluetooth/audio/mobile device with an Accel SoC, not enterprise networking gear; do not record the third-party "2008" date as an IEEE registration date.