~/dnsniffer/issuers/istec·rank #117
▸ How many domains does ISTEC secure?
182
active domains whose current TLS certificate was issued by ISTEC, as of - 0.00% of all attributed domains.
# rank #117 of all CAs ▼ 8 in 30d# all records held: 182# subdomains: 0# intermediates: 1# Spain
~/issuers/istec/history·active domains
182
domains secured by ISTEC on 2026-10-14 · ▲ +53 (+41.09%) since 2025-06-30
# y-axis starts at 111.12, 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
▼ -24.79%
-60 domains
90 days
▼ -34.53%
-96 domains
1 year
▼ -32.09%
-86 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| ACCV RSA1 TLS | Spain | 182 |
# faq
- ? How many domains does ISTEC secure?
- ISTEC is the certificate authority for 182 active domains as of October 14, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is ISTEC gaining or losing market share?
- The number of domains secured by ISTEC has shrunk by 32.09% over the last year (-86 domains).
- ? Which intermediate CAs does ISTEC sign from?
- We have seen 1 intermediates under ISTEC, the busiest being “ACCV RSA1 TLS” with 182 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.