Beijing Sinead Technology Co., Ltd. — 2 prefixes (MA-L)

Beijing Sinead Technology Co., Ltd. holds two independent IEEE MA-L (24-bit OUI) assignments — 3C:9F:C3 and 80:61:5F — both registered to the identical organization name and mailing address in Beijing, China. Two separate MA-L blocks to one registrant is itself a substance signal: an aggregator or single-product shell typically carries only one prefix, so consolidating both under a single vendor entry reflects a real hardware manufacturer rather than a bare registration. The registry address is transcribed as "Room 504, Block A, New material Building, Yongfeng industrial, Haiding District, Beijing, China 100094" — note "Haiding" is almost certainly a registry-side transcription of Beijing's Haidian District, a well-known technology-park area; the entry preserves the source string but flags the likely intended spelling. Secondary Chinese-language sources associate this registrant with a Beijing computer-peripherals company (transliterated variously as Shiningda / 世宁达) that manufactures network interface cards, graphics cards, and motherboards, and a third-party PCI-ID aggregator attributes a PCI vendor ID to the same name — both consistent with NIC/adapter hardware but sourced only to aggregators and search snippets, so the corporate-identity link is tagged Likely rather than Confirmed. Per IEEE practice, no assignment or registration date is published for either OUI, and any "date registered" seen on third-party lookup tools is a database artifact, not an IEEE fact.

IEEE assignment

2 prefixes → Beijing Sinead Technology Co., Ltd. [Confirmed] — IEEE MA-L (local the IEEE MA-L registry, 2 matching rows)

Registry / block size

MA-L (24-bit OUI); both assignments are MA-L (no MA-M/MA-S rows found) [Confirmed] — IEEE MA-L

Verified prefixes (both MA-L, same registrant)

3C:9F:C3, 80:61:5F [Confirmed] — IEEE MA-L

Org name (exact registry string)

"Beijing Sinead Technology Co., Ltd." (a trailing space is present in the source string; preserved verbatim, not corrected) [Confirmed] — IEEE MA-L

HQ / country

Room 504, Block A, New material Building, Yongfeng industrial, Haiding District, Beijing, China 100094 (registry address; "Haiding" is almost certainly a registry transcription of Beijing's Haidian District) [Confirmed as-transcribed; Haidian correction is Likely] — IEEE MA-L

Registration date

none — IEEE publishes NO assignment/registration date for OUI/MA-L blocks. Third-party tools showing "registered 2017-05-24" (80:61:5F) and "registered 2021-06-16" (3C:9F:C3) are database artifacts, NOT IEEE facts, and are not recorded as such.

[Confirmed absence] — IEEE MA-L; artifact dates seen at maclookup.app

IANA reference

N/A — OUI/MA-L is IEEE-administered, not an IANA registry; no IANA Reference column applies [Confirmed] — IEEE Registration Authority

Company status

identifiable hardware company (NICs / graphics cards / motherboards) per Chinese-language secondary sources; corporate identity (Sinead ↔ 世宁达 / Shiningda) not confirmed against a primary bilingual business-registry record

[Likely] — zhipin.com recruiting listing, bkwk.cn / 163.com company-profile articles

Device types

network interface cards, graphics cards, motherboards (NIC/adapter hardware); a PCI vendor ID (1DCF) is attributed to the same name by a third-party PCI-ID aggregator, consistent with card hardware but not independently verified against canonical pci.ids [Likely] — devicekb.com PCI-vendor page

Security / abuse context

no abuse reports, malware/botnet attributions, or advisories found for either prefix in this pass; this is absence-of-findings from general web search only, not an exhaustive threat-intel check [Unknown] — no sources

Analyst note

A globally-administered 3C:9F:C3 or 80:61:5F address identifies genuine Beijing Sinead hardware; treat the Chinese company-identity chain as provisional (secondary sources only) and never publish a "registration date" for these OUIs.