EPoX Computer Co., Ltd. — 2 prefixes (MA-L)

A MAC address starting with 00:04:61 or 00:09:20 belongs to EPoX Computer Co., Ltd., a Taiwanese PC-hardware manufacturer, most likely seen on the onboard Ethernet NIC of an EPoX-branded motherboard.

EPoX was established in February 1995 and headquartered in Chung Ho City, Taipei Hsien, Taiwan. It built motherboards for AMD and Intel platforms, video cards, and communication products, and was known among enthusiasts for overclocker-friendly, competitively priced mainboards. It claims to have been first to market with KBPO (Keyboard Power On) technology in 1997, and went public on the Taiwan Stock Exchange (TAIEX: 5414) in November 1999.

EPoX shut down entirely in 2007, closing its Taiwan, Germany, US, and Netherlands branches. Former employees launched a successor, SUPoX, in 2009, but it operates only in China supporting legacy EPoX boards and has no independent networking or OUI activity of its own.

Two MA-L (24-bit) OUI blocks trace to this company: 00:04:61, registered as "EPOX Computer Co., Ltd.," at 11F, #346 Chung San Rd., Taiwan; and 00:09:20, registered as "EpoX COMPUTER CO.,LTD." at 10th Floor, No.346, Chung San Rd., Sec.2, Chung Ho City, Taipei Hsien. Both rows share the same street number (#346 Chung San Rd.) on different floors, though only the 000920 row carries the Sec.2 / city / postcode detail — consistent with the two being capitalization variants of one entity rather than separate companies. IEEE's public registry publishes no assignment date for either block.

No CVE or vendor security advisory tied to the EPOX name was found as of an August 2026 search, and no malware or botnet association surfaced either. Because the company closed in 2007, any hardware seen with these prefixes today is legacy, end-of-life equipment with no active vendor patch stream — a fact worth noting for asset-age inventory, though it is not evidence of a known vulnerability.

IEEE assignment

2 prefixes → EPoX Computer Co., Ltd. (Taiwan) [Confirmed] — the IEEE MA-L registry, assignment 000461; the IEEE MA-L registry, assignment 000920

Registry / block size

MA-L (24-bit OUI) × 2; both are non-shared, single-company blocks (not a shared IEEE administrative base) [Confirmed] — the IEEE MA-L registry

HQ / country

Chung Ho City, Taipei Hsien, Taiwan, R.O.C. (registry addresses: 11F, #346 Chung San Rd. and 10F, #346 Chung San Rd., Sec.2) [Confirmed] — the IEEE MA-L registry, assignment 000461; the IEEE MA-L registry, assignment 000920

Company status

defunct (closed 2007); successor SUPoX (2009) is China-only and unrelated to networking/OUI activity [Confirmed] — https://en.wikipedia.org/wiki/EPoX, https://hardforum.com/threads/goodbye-epox-hello-supox.1202718/

Device types

motherboards (AMD/Intel), video cards, communication products [Confirmed] — https://en.wikipedia.org/wiki/EPoX

Notable products

overclocker-oriented mainboards; claims first-to-market KBPO (Keyboard Power On) technology in 1997 [Confirmed] — https://en.wikipedia.org/wiki/EPoX

Verified sample prefixes

00:04:61 ("EPOX Computer Co., Ltd."), 00:09:20 ("EpoX COMPUTER CO.,LTD.") [Confirmed] — the IEEE MA-L registry, assignment 000461; the IEEE MA-L registry, assignment 000920

Historic block

none found — the IEEE MA-M registry and the IEEE MA-S registry contain no additional EPOX-related rows [Confirmed absence in local registry snapshot] — the IEEE MA-M registry; the IEEE MA-S registry

Special note

EPoX went public on the Taiwan Stock Exchange (TAIEX: 5414) in November 1999; all branches (Taiwan, Germany, US, Netherlands) closed in 2007. IEEE's the IEEE MA-L registry publishes no assignment/registration date for either block; any third-party "date registered" is a database artifact, not an IEEE fact. [Confirmed] — https://www.bloomberg.com/profile/company/5414:TT, https://forums.guru3d.com/threads/epox-is-shutting-down-this-month.229461/

Related vendors

SUPoX (2009 successor, formed by former employees, China-only, unrelated to OUI/networking activity) [Confirmed] — https://hardforum.com/threads/goodbye-epox-hello-supox.1202718/

Analyst note

A MAC under 00:04:61 or 00:09:20 identifies EPoX Computer Co. hardware — likely a motherboard-integrated NIC — from a Taiwanese PC-component vendor that operated 1995–2007 with no successor product line or vendor security support since. Both blocks are non-shared MA-L /24s assigned solely to this one company, so this is a direct, unqualified vendor identification, not a sub-allocation call. No CVE or malware association was found as of an August 2026 search.

[Confirmed] — the IEEE MA-L registry, assignment 000461; the IEEE MA-L registry, assignment 000920; https://en.wikipedia.org/wiki/EPoX