~/dnsniffer/issuers/taiwan-ca·rank #53
$ dnsniffer count --issuer taiwan-ca --active
▸ How many domains does TAIWAN-CA secure?
3,603
active domains whose current TLS certificate was issued by TAIWAN-CA, as of — 0.00% of all attributed domains.
# rank #53 of all CAs# all records held: 3,650# subdomains: 515# intermediates: 4# Taiwan
~/issuers/taiwan-ca/history·active domains
3,603
domains secured by TAIWAN-CA on 2026-08-31 · ▲ +2,530 (+235.79%) since 2025-06-30
# y-axis starts at 769.4000000000001, 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
▲ +0.00%
+0 domains
90 days
▲ +0.78%
+28 domains
1 year
▲ +6.06%
+206 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| TWCA SSL Certification Authority | Taiwan | 1,967 |
| TWCA Secure SSL Certification Authority | Taiwan | 1,599 |
| TWCA EVSSL Certification Authority | Taiwan | 26 |
| TWCA Global EVSSL Certification Authority | Taiwan | 11 |
# faq
- ? How many domains does TAIWAN-CA secure?
- TAIWAN-CA is the certificate authority for 3,603 active domains as of August 31, 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 6.06% over the last year (+206 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 1,967 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.