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~/dnsniffer/issuers/cybertrust-japan-co·rank #38

▸ How many domains does Cybertrust Japan Co secure?

10,072

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

# rank #38 of all CAs ▼ 3 in 30d# all records held: 10,211# subdomains: 183# intermediates: 2# Japan
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~/issuers/cybertrust-japan-co/history·active domains
10,072
domains secured by Cybertrust Japan Co on 2026-10-15 · ▲ +7,279 (+260.62%) since 2025-06-30
1.7K4.5K7.2K9.9K12.6K2025-06-30: 2,793 active2025-07-31: 10,367 active2025-08-31: 10,390 active2025-09-30: 10,409 active2025-10-31: 10,409 active2025-11-30: 10,409 active2025-12-31: 10,591 active2026-01-31: 10,821 active2026-02-28: 10,821 active2026-03-31: 10,821 active2026-04-30: 11,064 active2026-05-31: 11,165 active2026-06-30: 11,219 active2026-07-31: 11,263 active2026-08-31: 11,263 active2026-09-01: 11,224 active2026-09-02: 11,259 active2026-09-03: 11,298 active2026-09-04: 11,417 active2026-09-05: 11,435 active2026-09-06: 11,416 active2026-09-07: 11,412 active2026-09-08: 11,463 active2026-09-09: 11,461 active2026-09-10: 11,464 active2026-09-11: 11,502 active2026-09-12: 11,523 active2026-09-13: 11,494 active2026-09-14: 11,509 active2026-09-15: 11,529 active2026-09-16: 11,461 active2026-09-17: 11,413 active2026-09-18: 11,360 active2026-09-19: 11,327 active2026-09-20: 11,306 active2026-09-21: 11,290 active2026-09-22: 11,275 active2026-09-23: 11,251 active2026-09-24: 11,408 active2026-09-25: 11,351 active2026-09-26: 11,300 active2026-09-27: 11,285 active2026-09-28: 11,260 active2026-09-29: 11,149 active2026-09-30: 11,073 active2026-10-01: 10,971 active2026-10-02: 10,911 active2026-10-03: 10,873 active2026-10-04: 10,861 active2026-10-05: 10,833 active2026-10-06: 10,710 active2026-10-07: 10,471 active2026-10-08: 10,361 active2026-10-09: 10,297 active2026-10-10: 10,258 active2026-10-11: 10,245 active2026-10-12: 10,233 active2026-10-13: 10,205 active2026-10-14: 10,135 active2026-10-15: 10,072 active2025-06-302026-10-15

# y-axis starts at 1.7K, 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
▼ -12.64%
-1,457 domains
90 days
▼ -10.22%
-1,147 domains
1 year
▼ -3.24%
-337 domains
# intermediate CAs
Intermediate certificate authorities operating under Cybertrust Japan Co, with the number of active domains each currently secures.
intermediatecountrydomains
Cybertrust Japan SureServer CA G4Japan7,744
Cybertrust Japan SureServer EV CA G3Japan2,328
# faq
? How many domains does Cybertrust Japan Co secure?
Cybertrust Japan Co is the certificate authority for 10,072 active domains as of October 15, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is Cybertrust Japan Co gaining or losing market share?
The number of domains secured by Cybertrust Japan Co has shrunk by 3.24% over the last year (-337 domains).
? Which intermediate CAs does Cybertrust Japan Co sign from?
We have seen 2 intermediates under Cybertrust Japan Co, the busiest being “Cybertrust Japan SureServer CA G4” with 7,744 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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