~/dnsniffer/issuers/secom-trust-systems·rank #61
$ dnsniffer count --issuer secom-trust-systems --active
▸ How many domains does SECOM Trust Systems secure?
2,942
active domains whose current TLS certificate was issued by SECOM Trust Systems, as of — 0.00% of all attributed domains.
# rank #61 of all CAs# all records held: 3,252# subdomains: 3,961# intermediates: 9# Japan
~/issuers/secom-trust-systems/history·active domains
2,942
domains secured by SECOM Trust Systems on 2026-08-31 · ▲ +1,585 (+116.80%) since 2025-06-30
# y-axis starts at 1K, 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
▼ -0.03%
-1 domains
90 days
▼ -0.03%
-1 domains
1 year
▲ +2.15%
+62 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| FujiSSL Public Validation Authority - G3 | Japan | 1,464 |
| SECOM Passport for Web SR 3.0 CA | Japan | 1,186 |
| NII Open Domain CA - G8 RSA | Japan | 231 |
| SECOM Passport for Web EV 2.0 CA | Japan | 48 |
| NII Open Domain CA - G7 RSA | Japan | 12 |
| CrossTrust OV CA5 | Japan | 1 |
| Subordinate Advanced CA G2 | Japan | 0 |
| CrossTrust DV CA5 | Japan | 0 |
| NII Open Domain CA - G7 ECC | Japan | 0 |
# faq
- ? How many domains does SECOM Trust Systems secure?
- SECOM Trust Systems is the certificate authority for 2,942 active domains as of August 31, 2026 — 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is SECOM Trust Systems gaining or losing market share?
- The number of domains secured by SECOM Trust Systems has grown by 2.15% over the last year (+62 domains).
- ? Which intermediate CAs does SECOM Trust Systems sign from?
- We have seen 9 intermediates under SECOM Trust Systems, the busiest being “FujiSSL Public Validation Authority - G3” with 1,464 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.