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~/dnsniffer/issuers/a-trust·rank #185

▸ How many domains does A-Trust secure?

12

active domains whose current TLS certificate was issued by A-Trust, as of - 0.00% of all attributed domains.

# rank #185 of all CAs ▼ 6 in 30d# all records held: 12# subdomains: 0# intermediates: 2# Austria
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~/issuers/a-trust/history·active domains
12
domains secured by A-Trust on 2026-10-15 · ▲ +10 (+500.00%) since 2025-06-30
0.684.097.510.9114.322025-06-30: 2 active2025-07-31: 9 active2025-08-31: 9 active2025-09-30: 9 active2025-10-31: 9 active2025-11-30: 9 active2025-12-31: 9 active2026-01-31: 9 active2026-02-28: 9 active2026-03-31: 9 active2026-04-30: 9 active2026-05-31: 9 active2026-06-30: 9 active2026-07-31: 9 active2026-08-31: 9 active2026-09-01: 9 active2026-09-02: 12 active2026-09-03: 13 active2026-09-04: 13 active2026-09-05: 13 active2026-09-06: 12 active2026-09-07: 12 active2026-09-08: 13 active2026-09-09: 11 active2026-09-10: 11 active2026-09-11: 10 active2026-09-12: 11 active2026-09-13: 11 active2026-09-14: 11 active2026-09-15: 11 active2026-09-16: 10 active2026-09-17: 6 active2026-09-18: 6 active2026-09-19: 8 active2026-09-20: 7 active2026-09-21: 7 active2026-09-22: 7 active2026-09-23: 6 active2026-09-24: 6 active2026-09-25: 6 active2026-09-26: 5 active2026-09-27: 5 active2026-09-28: 5 active2026-09-29: 5 active2026-09-30: 4 active2026-10-01: 4 active2026-10-02: 4 active2026-10-03: 4 active2026-10-04: 3 active2026-10-05: 3 active2026-10-06: 2 active2026-10-07: 2 active2026-10-08: 2 active2026-10-09: 2 active2026-10-10: 6 active2026-10-11: 6 active2026-10-12: 6 active2026-10-13: 6 active2026-10-14: 7 active2026-10-15: 12 active2025-06-302026-10-15

# y-axis starts at 0.68, 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
▲ +9.09%
+1 domains
90 days
▲ +33.33%
+3 domains
1 year
▲ +33.33%
+3 domains
# intermediate CAs
Intermediate certificate authorities operating under A-Trust, with the number of active domains each currently secures.
intermediatecountrydomains
a-sign-SSL-EV-09Austria12
a-sign-SSL-09Austria0
# faq
? How many domains does A-Trust secure?
A-Trust is the certificate authority for 12 active domains as of October 15, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is A-Trust gaining or losing market share?
The number of domains secured by A-Trust has grown by 33.33% over the last year (+3 domains).
? Which intermediate CAs does A-Trust sign from?
We have seen 2 intermediates under A-Trust, the busiest being “a-sign-SSL-EV-09” with 12 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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