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~/dnsniffer/issuers/alpiro-s-r-o·rank #52

▸ How many domains does Alpiro s.r.o secure?

3,921

active domains whose current TLS certificate was issued by Alpiro s.r.o, as of - 0.00% of all attributed domains.

# rank #52 of all CAs# all records held: 3,989# subdomains: 169# intermediates: 6# Czechia
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~/issuers/alpiro-s-r-o/history·active domains
3,921
domains secured by Alpiro s.r.o on 2026-10-15 · ▲ +3,476 (+781.12%) since 2025-06-30
27.881.1K2.2K3.3K4.3K2025-06-30: 445 active2025-07-31: 3,250 active2025-08-31: 3,257 active2025-09-30: 3,259 active2025-10-31: 3,259 active2025-11-30: 3,259 active2025-12-31: 3,378 active2026-01-31: 3,437 active2026-02-28: 3,437 active2026-03-31: 3,437 active2026-04-30: 3,738 active2026-05-31: 3,789 active2026-06-30: 3,804 active2026-07-31: 3,822 active2026-08-31: 3,822 active2026-09-01: 3,817 active2026-09-02: 3,816 active2026-09-03: 3,665 active2026-09-04: 3,584 active2026-09-05: 3,581 active2026-09-06: 3,580 active2026-09-07: 3,573 active2026-09-08: 3,578 active2026-09-09: 3,600 active2026-09-10: 3,602 active2026-09-11: 3,612 active2026-09-12: 3,608 active2026-09-13: 3,572 active2026-09-14: 3,562 active2026-09-15: 3,570 active2026-09-16: 3,562 active2026-09-17: 3,560 active2026-09-18: 3,570 active2026-09-19: 3,569 active2026-09-20: 3,571 active2026-09-21: 3,568 active2026-09-22: 3,569 active2026-09-23: 3,578 active2026-09-24: 3,876 active2026-09-25: 3,882 active2026-09-26: 3,892 active2026-09-27: 3,893 active2026-09-28: 3,887 active2026-09-29: 3,891 active2026-09-30: 3,897 active2026-10-01: 3,903 active2026-10-02: 3,905 active2026-10-03: 3,911 active2026-10-04: 3,903 active2026-10-05: 3,901 active2026-10-06: 3,910 active2026-10-07: 3,908 active2026-10-08: 3,905 active2026-10-09: 3,910 active2026-10-10: 3,910 active2026-10-11: 3,905 active2026-10-12: 3,909 active2026-10-13: 3,912 active2026-10-14: 3,921 active2026-10-15: 3,921 active2025-06-302026-10-15

# y-axis starts at 27.88, 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
▲ +9.83%
+351 domains
90 days
▲ +3.08%
+117 domains
1 year
▲ +20.31%
+662 domains
# intermediate CAs
Intermediate certificate authorities operating under Alpiro s.r.o, with the number of active domains each currently secures.
intermediatecountrydomains
Alpiro RSA DV SSL CA 2-3,140
AlpiroSSL RSA DV CACzechia751
AlpiroSSL RSA EV CACzechia11
Alpiro RSA OV SSL CA 2Czechia11
Alpiro RSA EV SSL CA 2Czechia5
AlpiroSSL RSA OV CACzechia3
# faq
? How many domains does Alpiro s.r.o secure?
Alpiro s.r.o is the certificate authority for 3,921 active domains as of October 15, 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 20.31% over the last year (+662 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 3,140 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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