Hon Hai Precision Ind. Co., Ltd. (Foxconn) — ~152 prefixes (MA-L) + 1 MA-S

Hon Hai Precision Ind. Co., Ltd. — the parent of the Foxconn Technology Group and the world's largest electronics contract manufacturer — holds one of the heaviest OUI footprints in the IEEE registry: the cached IEEE registries carry 152 MA-L blocks plus a single MA-S assignment (70:B3:D5:B45), placing it among the largest single-vendor OUI holders. The blocks appear under several spellings ("Hon Hai Precision Ind. Co.,Ltd.", "Hon Hai Precision Industry Co., Ltd.", and a "HON HAI-CCPBG PRECISION IND.CO.,LTD." variant) and across multiple registered addresses spanning Taiwan (Tucheng / New Taipei) and mainland China (Shenzhen, Chongqing, Nanning, Hsinchu). The critical interpretation note for any Hon Hai OUI work: Foxconn is a contract manufacturer, so a "Hon Hai Precision" or "HonHaiPr" entry on a network scan almost always identifies the *component* — the Wi-Fi module or NIC Foxconn fabricated — not a Foxconn-branded end product. The actual device is typically another brand's hardware (Apple, Sony, Dell, Nintendo, and many others) whose network interface Foxconn built, so the OUI cannot establish device class on its own. The OUI itself carries no elevated security risk; Foxconn is not subject to US Entity List or FCC equipment bans the way Huawei is, and no device-firmware CVEs specific to Hon Hai NICs surfaced in this pass. (A May 2026 ransomware incident hit Foxconn's own North American facilities — that is internal-infrastructure exposure, unrelated to devices carrying a Foxconn OUI.)

IEEE assignment

152 MA-L prefixes + 1 MA-S (70:B3:D5:B45) → Hon Hai Precision Ind. Co., Ltd. [Confirmed] — cached IEEE registries (the IEEE MA-L registry 152 MA-L rows, the IEEE MA-S registry 1 MA-S row; the IEEE MA-M registry 0 MA-M rows)

Registry / block size

MA-L (24-bit OUI) for the bulk of blocks; one MA-S (36-bit). Local IEEE cache = 152 MA-L + 1 MA-S; third-party aggregators split the MA-L count across two registrant spellings (~135 under "Hon Hai Precision Ind. Co., Ltd." + ~17 under "Hon Hai Precision Industry Co., Ltd.") for a combined total in the same ~150 range [Confirmed count from IEEE cache; third-party per-name splits are Likely] — IEEE registry cache; maclookup.app, macaddress.io. 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" on third-party tools (e.g. maclookup.app "last updated") is that tool's index refresh, not an IEEE fact.

Registered names

"Hon Hai Precision Ind. Co.,Ltd.", "Hon Hai Precision Industry Co., Ltd.", "HON HAI-CCPBG PRECISION IND.CO.,LTD." (registry spelling variants for the same entity) [Confirmed] — IEEE MA-L

HQ / corporate address

No. 2, Ziyou St., Tucheng Dist., New Taipei City 236, Taiwan [Confirmed] — honhai.com group profile

Registry addresses (sampled, multiple)

No. 66 Chung Shan Road, Tu-Cheng Industrial district, New Taipei / Taipei, Taiwan; Building D21, East Zone 1st Road, Chongqing; Shenzhen, Guangdong; Foxconn Industrial Park, Nanning, Guangxi; Science Park, Hsinchu [Confirmed] — IEEE MA-L

Country

registry lists CN throughout (ISO code used for both the Taiwan and mainland-China filings); corporate HQ is in Taiwan (TW) [Confirmed] — IEEE MA-L (CN in registry); honhai.com (TW HQ)

Company status

active — publicly listed (TWSE: 2317; OTC: HNHAF); world's largest electronics contract manufacturer (EMS) [Confirmed] — honhai.com, finance.yahoo.com

Industry

electronics contract manufacturing (EMS) — components, assemblies, and finished goods for global technology brands [Confirmed] — en.wikipedia.org/wiki/Foxconn, honhai.com

Trade name

Foxconn Technology Group [Confirmed] — honhai.com

Device types

Wi-Fi modules / NICs (the most common reason a Foxconn OUI appears on a scan — Foxconn is the component vendor, not the end-product brand); also smartphones, tablets, laptops, desktops, gaming consoles, smart TVs, set-top boxes, routers/networking gear, servers, wearables, and IoT/smart-home devices

[Confirmed] — candid.technology, aeanet.org, maclookup.app

Notable clients (corroborate device reach)

Apple, Sony, Dell, Nintendo — confirms a broad span of consumer/enterprise categories can carry a Foxconn OUI [Confirmed] — en.wikipedia.org/wiki/Foxconn, honhai.com

Allocated date

Unknown — IEEE does not publish OUI/MAC registration dates, and no date field exists in the cached the IEEE MA-L registry / the IEEE MA-S registry / the IEEE MA-M registry [Confirmed null] — IEEE registry cache

Security context

low inherent risk from the OUI itself — it is a component-vendor identification artifact, not a security indicator. Foxconn is not on the US Entity List / FCC ban list (unlike Huawei). No Hon Hai NIC/Wi-Fi-module firmware CVEs found this pass. The May 2026 Nitrogen ransomware attack hit Foxconn's own North American facilities (internal infrastructure), not Foxconn-OUI devices

[Confirmed] — candid.technology, cybersecuritydive.com, theregister.com

Analyst note

A Hon Hai Precision OUI almost certainly indicates a consumer/enterprise device whose Wi-Fi module or NIC was made by Foxconn — not a Foxconn-branded product. Device class cannot be confirmed from the OUI alone. No special FCC/Entity-List concern applies as it would for Huawei; in supply-chain-sensitive environments, noting Foxconn's Taiwan base with major mainland-China manufacturing exposure (Zhengzhou, Shenzhen) may be relevant for risk documentation.