~/dnsniffer/issuers/alpiro-s-r-o·rank #51
$ dnsniffer count --issuer alpiro-s-r-o --active
▸ How many domains does Alpiro s.r.o secure?
3,822
active domains whose current TLS certificate was issued by Alpiro s.r.o, as of — 0.00% of all attributed domains.
# rank #51 of all CAs# all records held: 3,977# subdomains: 169# intermediates: 6# Czechia
~/issuers/alpiro-s-r-o/history·active domains
3,822
domains secured by Alpiro s.r.o on 2026-08-31 · ▲ +3,377 (+758.88%) since 2025-06-30
# y-axis starts at 39.75999999999999, 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
▲ +0.87%
+33 domains
1 year
▲ +17.35%
+565 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| Alpiro RSA DV SSL CA 2 | — | 2,986 |
| AlpiroSSL RSA DV CA | Czechia | 807 |
| Alpiro RSA OV SSL CA 2 | Czechia | 11 |
| AlpiroSSL RSA EV CA | Czechia | 10 |
| Alpiro RSA EV SSL CA 2 | Czechia | 5 |
| AlpiroSSL RSA OV CA | Czechia | 3 |
# faq
- ? How many domains does Alpiro s.r.o secure?
- Alpiro s.r.o is the certificate authority for 3,822 active domains as of August 31, 2026 — 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is Alpiro s.r.o gaining or losing market share?
- The number of domains secured by Alpiro s.r.o has grown by 17.35% over the last year (+565 domains).
- ? Which intermediate CAs does Alpiro s.r.o sign from?
- We have seen 6 intermediates under Alpiro s.r.o, the busiest being “Alpiro RSA DV SSL CA 2” with 2,986 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.