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~/dnsniffer/issuers/chunghwa-telecom-co·rank #150

▸ How many domains does Chunghwa Telecom Co secure?

69

active domains whose current TLS certificate was issued by Chunghwa Telecom Co, as of - 0.00% of all attributed domains.

# rank #150 of all CAs ▲ 20 in 30d# all records held: 91# subdomains: 0# intermediates: 1# Taiwan
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~/issuers/chunghwa-telecom-co/history·active domains
69
domains secured by Chunghwa Telecom Co on 2026-10-14 · ▼ -24 (-25.81%) since 2025-07-31
7.8831.445578.56102.122025-07-31: 93 active2025-08-31: 93 active2025-09-30: 93 active2025-10-31: 93 active2025-11-30: 93 active2025-12-31: 93 active2026-01-31: 93 active2026-02-28: 93 active2026-03-31: 93 active2026-04-30: 93 active2026-05-31: 93 active2026-06-30: 93 active2026-07-31: 93 active2026-08-31: 93 active2026-09-01: 93 active2026-09-02: 93 active2026-09-03: 93 active2026-09-04: 89 active2026-09-05: 89 active2026-09-06: 83 active2026-09-07: 18 active2026-09-08: 18 active2026-09-09: 18 active2026-09-10: 18 active2026-09-11: 17 active2026-09-12: 17 active2026-09-13: 17 active2026-09-14: 17 active2026-09-15: 17 active2026-09-16: 17 active2026-09-17: 17 active2026-09-18: 17 active2026-09-19: 17 active2026-09-20: 17 active2026-09-21: 17 active2026-09-22: 17 active2026-09-23: 17 active2026-09-24: 74 active2026-09-25: 71 active2026-09-26: 72 active2026-09-27: 72 active2026-09-28: 71 active2026-09-29: 71 active2026-09-30: 70 active2026-10-01: 70 active2026-10-02: 70 active2026-10-03: 70 active2026-10-04: 70 active2026-10-05: 70 active2026-10-06: 70 active2026-10-07: 70 active2026-10-08: 70 active2026-10-09: 70 active2026-10-10: 70 active2026-10-11: 71 active2026-10-12: 70 active2026-10-13: 69 active2026-10-14: 69 active2025-07-312026-10-14

# y-axis starts at 7.88, 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
▲ +305.88%
+52 domains
90 days
▼ -25.81%
-24 domains
1 year
▼ -25.81%
-24 domains
# intermediate CAs
Intermediate certificate authorities operating under Chunghwa Telecom Co, with the number of active domains each currently secures.
intermediatecountrydomains
HiPKI OV TLS CA - G1Taiwan69
# faq
? How many domains does Chunghwa Telecom Co secure?
Chunghwa Telecom Co is the certificate authority for 69 active domains as of October 14, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is Chunghwa Telecom Co gaining or losing market share?
The number of domains secured by Chunghwa Telecom Co has shrunk by 25.81% over the last year (-24 domains).
? Which intermediate CAs does Chunghwa Telecom Co sign from?
We have seen 1 intermediates under Chunghwa Telecom Co, the busiest being “HiPKI OV TLS CA - G1” with 69 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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