~/dnsniffer/issuers/secom-trust-systems-co·rank #83
$ dnsniffer count --issuer secom-trust-systems-co --active
▸ How many domains does SECOM Trust Systems Co secure?
1,319
active domains whose current TLS certificate was issued by SECOM Trust Systems Co, as of — 0.00% of all attributed domains.
# rank #83 of all CAs# all records held: 1,320# subdomains: 0# intermediates: 2# Japan
~/issuers/secom-trust-systems-co/history·active domains
1,319
domains secured by SECOM Trust Systems Co on 2026-08-31 · ▲ +669 (+102.92%) since 2025-06-30
# y-axis starts at 569.72, 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
▲ +0.08%
+1 domains
90 days
▲ +2.25%
+29 domains
1 year
▲ +5.69%
+71 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| SECOM Passport for Web OV RSA CA 2024 | Japan | 1,266 |
| SECOM Passport for Web EV RSA CA 2024 | Japan | 53 |
# faq
- ? How many domains does SECOM Trust Systems Co secure?
- SECOM Trust Systems Co is the certificate authority for 1,319 active domains as of August 31, 2026 — 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is SECOM Trust Systems Co gaining or losing market share?
- The number of domains secured by SECOM Trust Systems Co has grown by 5.69% over the last year (+71 domains).
- ? Which intermediate CAs does SECOM Trust Systems Co sign from?
- We have seen 2 intermediates under SECOM Trust Systems Co, the busiest being “SECOM Passport for Web OV RSA CA 2024” with 1,266 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.