TESTOP CO., LTD. — 2 prefixes (MA-L)

A MAC address starting with 44:42:2F or 04:65:65 belongs to TESTOP CO., LTD. (테스탑), a South Korean manufacturer, typically seen on industrial PCB/circuit-board inspection systems and factory-automation equipment rather than consumer networking gear.

Two independent IEEE registrations point at the same company rather than a shared IEEE base. Both blocks are registered to the identical Seoul address — 808 Hanshin IT Tower, 272 Digital-ro, Guro-gu — one filed as "TESTOP CO.,LTD." and the other as "Testop." No the IEEE MA-M registry or the IEEE MA-S registry sub-allocations exist under either block.

Per a third-party Korean corporate profile (JobKorea, not the registry and not an official TESTOP source), the company was founded 2009-03-02, employs roughly 35 people, and reports about 8 billion KRW in revenue, manufacturing PCB inspection and factory-automation equipment. That founding date is a corporate fact, not an IEEE OUI registration date — IEEE publishes none for MAC prefix assignments.

Two caveats limit confidence. The apparent official site, testop.kr, could not be verified — WebFetch returned a TLS certificate mismatch pointing to an unrelated shared-hosting domain — so no claim here relies on it. No CVEs or security advisories referencing TESTOP equipment were found, which is an absence of findings, not a confirmed clean bill.

IEEE assignment

2 prefixes → "TESTOP CO.,LTD." / "Testop", registered Seoul, KR [Confirmed] — IEEE MA-L, the IEEE MA-L registry 44422F, the IEEE MA-L registry 046565

Registry / block size

MA-L (24-bit OUI) x2; no the IEEE MA-M registry or the IEEE MA-S registry sub-allocations found under either block [Confirmed] — the IEEE MA-L registry, the Wireshark manufacturer database

HQ / country

808 Hanshin IT Tower, 272 Digital-ro, Guro-gu, Seoul, KR (registry address) [Confirmed] — the IEEE MA-L registry 44422F, the IEEE MA-L registry 046565

Company status

likely active; not independently confirmed beyond a third-party recruiting-site profile [Likely] — JobKorea company profile

Device types

PCB/circuit-board inspection equipment, factory-automation devices [Likely] — JobKorea company profile

Notable products

Unknown — no specific product names verified [Unknown]

Verified sample prefixes

44:42:2F, 04:65:65 (both MA-L) [Confirmed] — IEEE the IEEE MA-L registry, keys 44422F, 046565

Historic block

none found — no other TESTOP-registered OUIs beyond these two turned up in the local registry mirror [Confirmed absence of evidence] — the IEEE MA-L registry

Special note

Official site testop.kr could not be verified — WebFetch failed with a TLS hostname/certificate mismatch (cert issued to an unrelated shared-hosting domain, nossl179.webmaker21.kr); no claim in this entry relies on that site [Confirmed] — testop.kr (fetch failed)

Related vendors

none identified [Unknown]

Analyst note

Two independent MA-L assignments to the same registrant and address corroborate a real, distinguishable company rather than a bare single-OUI shell; device-class and company-status claims stay [Likely] because they trace to a single third-party recruiting-site profile, not TESTOP's own materials

[Likely] — JobKorea company profile