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~/dnsniffer/issuers/taiwan-ca·rank #55

▸ How many domains does TAIWAN-CA secure?

3,622

active domains whose current TLS certificate was issued by TAIWAN-CA, as of - 0.00% of all attributed domains.

# rank #55 of all CAs ▼ 5 in 30d# all records held: 3,724# subdomains: 515# intermediates: 4# Taiwan
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~/issuers/taiwan-ca/history·active domains
3,622
domains secured by TAIWAN-CA on 2026-10-14 · ▲ +2,549 (+237.56%) since 2025-06-30
763.281.6K2.4K3.2K4.0K2025-06-30: 1,073 active2025-07-31: 3,388 active2025-08-31: 3,397 active2025-09-30: 3,408 active2025-10-31: 3,408 active2025-11-30: 3,408 active2025-12-31: 3,479 active2026-01-31: 3,507 active2026-02-28: 3,507 active2026-03-31: 3,507 active2026-04-30: 3,556 active2026-05-31: 3,575 active2026-06-30: 3,592 active2026-07-31: 3,603 active2026-08-31: 3,603 active2026-09-01: 3,600 active2026-09-02: 3,611 active2026-09-03: 3,618 active2026-09-04: 3,654 active2026-09-05: 3,619 active2026-09-06: 3,604 active2026-09-07: 3,594 active2026-09-08: 3,593 active2026-09-09: 3,610 active2026-09-10: 3,615 active2026-09-11: 3,614 active2026-09-12: 3,606 active2026-09-13: 3,592 active2026-09-14: 3,588 active2026-09-15: 3,604 active2026-09-16: 3,614 active2026-09-17: 3,605 active2026-09-18: 3,621 active2026-09-19: 3,624 active2026-09-20: 3,615 active2026-09-21: 3,601 active2026-09-22: 3,610 active2026-09-23: 3,614 active2026-09-24: 3,639 active2026-09-25: 3,607 active2026-09-26: 3,592 active2026-09-27: 3,577 active2026-09-28: 3,563 active2026-09-29: 3,569 active2026-09-30: 3,575 active2026-10-01: 3,592 active2026-10-02: 3,600 active2026-10-03: 3,594 active2026-10-04: 3,582 active2026-10-05: 3,574 active2026-10-06: 3,595 active2026-10-07: 3,619 active2026-10-08: 3,617 active2026-10-09: 3,620 active2026-10-10: 3,608 active2026-10-11: 3,602 active2026-10-12: 3,598 active2026-10-13: 3,625 active2026-10-14: 3,622 active2025-06-302026-10-14

# y-axis starts at 763.28, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.

# change over time
30 days
▲ +0.95%
+34 domains
90 days
▲ +0.84%
+30 domains
1 year
▲ +6.28%
+214 domains
# intermediate CAs
Intermediate certificate authorities operating under TAIWAN-CA, with the number of active domains each currently secures.
intermediatecountrydomains
TWCA SSL Certification AuthorityTaiwan2,543
TWCA Secure SSL Certification AuthorityTaiwan1,043
TWCA EVSSL Certification AuthorityTaiwan31
TWCA Global EVSSL Certification AuthorityTaiwan5
# faq
? How many domains does TAIWAN-CA secure?
TAIWAN-CA is the certificate authority for 3,622 active domains as of October 14, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is TAIWAN-CA gaining or losing market share?
The number of domains secured by TAIWAN-CA has grown by 6.28% over the last year (+214 domains).
? Which intermediate CAs does TAIWAN-CA sign from?
We have seen 4 intermediates under TAIWAN-CA, the busiest being “TWCA SSL Certification Authority” with 2,543 domains. The full list, with per-intermediate counts, is on this page.
? Where does this number come from?
DNSniffer ingests Certificate Transparency logs continuously and records the issuer of the most recent certificate seen for each domain, then snapshots the per-issuer count once a day. It measures how much of the live web a CA currently secures, not how many certificates it has issued over its lifetime.
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