dnsniffer.com
sign inget started→
~/dnsniffer/issuers/centre-testing-international-group-co·rank #174

▸ How many domains does Centre Testing International Group Co secure?

25

active domains whose current TLS certificate was issued by Centre Testing International Group Co, as of - 0.00% of all attributed domains.

# rank #174 of all CAs ▼ 8 in 30d# all records held: 26# subdomains: 2# intermediates: 3# China
search domains download the certificate dataset
~/issuers/centre-testing-international-group-co/history·active domains
25
domains secured by Centre Testing International Group Co on 2026-10-15 · ▲ +16 (+177.78%) since 2025-06-30
6.7212.6118.524.3930.282025-06-30: 9 active2025-07-31: 26 active2025-08-31: 26 active2025-09-30: 26 active2025-10-31: 26 active2025-11-30: 26 active2025-12-31: 27 active2026-01-31: 28 active2026-02-28: 28 active2026-03-31: 28 active2026-04-30: 28 active2026-05-31: 28 active2026-06-30: 28 active2026-07-31: 28 active2026-08-31: 28 active2026-09-01: 28 active2026-09-02: 28 active2026-09-03: 26 active2026-09-04: 25 active2026-09-05: 25 active2026-09-06: 25 active2026-09-07: 25 active2026-09-08: 25 active2026-09-09: 25 active2026-09-10: 25 active2026-09-11: 25 active2026-09-12: 25 active2026-09-13: 25 active2026-09-14: 25 active2026-09-15: 25 active2026-09-16: 24 active2026-09-17: 24 active2026-09-18: 24 active2026-09-19: 24 active2026-09-20: 24 active2026-09-21: 24 active2026-09-22: 24 active2026-09-23: 23 active2026-09-24: 26 active2026-09-25: 26 active2026-09-26: 26 active2026-09-27: 26 active2026-09-28: 26 active2026-09-29: 26 active2026-09-30: 26 active2026-10-01: 26 active2026-10-02: 26 active2026-10-03: 26 active2026-10-04: 26 active2026-10-05: 26 active2026-10-06: 26 active2026-10-07: 26 active2026-10-08: 26 active2026-10-09: 26 active2026-10-10: 25 active2026-10-11: 25 active2026-10-12: 25 active2026-10-13: 25 active2026-10-14: 25 active2026-10-15: 25 active2025-06-302026-10-15

# y-axis starts at 6.72, 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
▼ -10.71%
-3 domains
1 year
▼ -3.85%
-1 domains
# intermediate CAs
Intermediate certificate authorities operating under Centre Testing International Group Co, with the number of active domains each currently secures.
intermediatecountrydomains
CTI RSA OV SSL CAChina14
CTI RSA DV SSL CAChina10
CTI RSA EV SSL CAChina1
# faq
? How many domains does Centre Testing International Group Co secure?
Centre Testing International Group Co is the certificate authority for 25 active domains as of October 15, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is Centre Testing International Group Co gaining or losing market share?
The number of domains secured by Centre Testing International Group Co has shrunk by 3.85% over the last year (-1 domains).
? Which intermediate CAs does Centre Testing International Group Co sign from?
We have seen 3 intermediates under Centre Testing International Group Co, the busiest being “CTI RSA OV SSL CA” with 14 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.
all CAs rankedfastest growingfastest decliningTLD rankingsbulk datasets