Share of companies with a recorded size, by employees.
No size recorded: 2
Versions detected
1 versions across the confirmed companies. Counts are distinct companies seen running that version.
4.3.312
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Frequently asked questions
About the QNAP 421 data on this page.
How many companies use QNAP 421?
Firmable holds confirmed QNAP 421 detections for 10 distinct companies, 10 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use QNAP 421?
Telstra International, Aussie Broadband and The Hong Kong University of Science and Technology are among the most prominent in the current set.
What industries use QNAP 421?
Information technology and services, education and training and financial services lead the set, across 6 industries in total.
What size companies use QNAP 421?
Adoption concentrates in the 501-1,000 employee band, across the companies whose size is recorded.
Where are QNAP 421 users based?
The United States, Australia, Malaysia and Canada account for most detections, across 13 countries.
How current is this data?
10 companies were confirmed in the last 90 days. Last detection 13 October 2026.
