Mega Well Limited — 2 prefixes (MA-L)

Mega Well Limited holds two IEEE MA-L (large, /24) OUI blocks — A4-FC-77 and 10-5B-AD — both registered to the same organization at an identical address in Chongqing, China: Building D21, No.1, East Zone 1st Road, Xiyong Town, Shapingba District, Chongqing 401332. Each MA-L block covers roughly 16.7 million addresses, so the two allocations together lift this registrant above a bare single-OUI shell, but the surrounding company profile is thin. No official vendor website could be located, and public directories surface several similarly-named but apparently distinct entities (a Hong Kong "Mega Well Limited," a Shanghai "Mega Well Corporation Limited," and a now-dissolved UK "Mega Well International Limited"), so the corporate identity behind the IEEE registration is ambiguous. A single AI-synthesized search snippet described Mega Well as a DVR/NVR manufacturer, but that claim traces to an unreachable B2B directory page (gmdu.net) and could not be corroborated against any primary source, product page, or device teardown — it is therefore recorded as Unknown, not fact. Critically, the "22 July 2018 / 2018-07-22" registration date shown by third-party MAC-lookup aggregators is a database artifact, not an IEEE-published fact: IEEE's public OUI registry contains no assignment dates, so no registration date is recorded here.

IEEE assignment

2 MA-L prefixes → Mega Well Limited, Chongqing, CN [Confirmed] — the IEEE MA-L registry, :25528; corroborated by maclookup.app/vendors/mega-well-limited

Registry / block size

MA-L (24-bit OUI); 2 IEEE prefixes (~33.5M addresses total) [Confirmed] — the IEEE MA-L registry; udger.com/resources/mac-address-vendor-detail?name=mega_well_limited

Verified prefixes (both MA-L, Mega Well Limited)

A4-FC-77, 10-5B-AD [Confirmed] — the IEEE MA-L registry, :25528; maclookup.app/vendors/mega-well-limited

Registrant address

Building D21, No.1, East Zone 1st Road, Xiyong Town, Shapingba District, Chongqing 401332, CN [Confirmed] — the IEEE MA-L registry; maclookup.app/vendors/mega-well-limited

HQ / country

China (CN); Chongqing per registry address [Confirmed] — the IEEE MA-L registry

Registration date

Unknown — IEEE publishes NO OUI assignment/registration date. Third-party aggregators (maclookup.app, udger.com) display "2018-07-22" for both prefixes, but that is a database/ingestion artifact, not an IEEE fact, and is deliberately not recorded.

[Confirmed that IEEE publishes no date] — the IEEE MA-L registry (no date column)

MA-M / MA-S assignments

None found for this org in the cached the IEEE MA-M registry or the IEEE MA-S registry registries [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

Company status

Unknown — no official company website located; several similarly-named but distinct Mega Well entities exist in public directories (HK, Shanghai, dissolved UK), so the entity behind the IEEE registration is ambiguous

[Unknown] — dnb.com business directory, volza.com, UK Companies House (company 08222432, dissolved)

Official website

Unknown — no dedicated site for the Chongqing IEEE registrant found [Unknown] — WebSearch (no corroborated official site)

Device types

Unknown — one AI-synthesized snippet asserted DVR/NVR manufacturing, but it traced to an unreachable directory page (gmdu.net) and no primary source, product page, or teardown corroborates it [Unknown] — gmdu.net/corp-389197.html (unreachable, DNS timeout)

IANA Reference

N/A — not applicable to IEEE MAC/OUI vendor assignments (applies only to IANA protocol-parameter registries); stays blank.

Security / abuse context

None found — searches pairing the prefixes (10-5B-AD, A4-FC-77) with malware/botnet/CVE terms returned no relevant results [Unknown/none found] — WebSearch (no relevant hits)

Analyst note

Two MA-L blocks put this above a single-OUI shell, but there is no findable substantive first-party or corroborated third-party evidence of an operating business, product line, or device context. Treat as a thin, low-confidence multi-OUI registrant; do not surface a "registration date" and do not state DVR manufacturing as fact.