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~/dnsniffer/issuers/hellenic-academic-and-research-institutions-ca·rank #102

▸ How many domains does Hellenic Academic and Research Institutions CA secure?

497

active domains whose current TLS certificate was issued by Hellenic Academic and Research Institutions CA, as of - 0.00% of all attributed domains.

# rank #102 of all CAs ▼ 4 in 30d# all records held: 621# subdomains: 19# intermediates: 5# Greece
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~/issuers/hellenic-academic-and-research-institutions-ca/history·active domains
497
domains secured by Hellenic Academic and Research Institutions CA on 2026-10-14 · ▲ +366 (+279.39%) since 2025-06-30
64.88235.69406.5577.31748.122025-06-30: 131 active2025-07-31: 551 active2025-08-31: 556 active2025-09-30: 559 active2025-10-31: 559 active2025-11-30: 559 active2025-12-31: 573 active2026-01-31: 650 active2026-02-28: 650 active2026-03-31: 650 active2026-04-30: 664 active2026-05-31: 668 active2026-06-30: 677 active2026-07-31: 682 active2026-08-31: 682 active2026-09-01: 681 active2026-09-02: 675 active2026-09-03: 635 active2026-09-04: 622 active2026-09-05: 610 active2026-09-06: 608 active2026-09-07: 605 active2026-09-08: 605 active2026-09-09: 603 active2026-09-10: 608 active2026-09-11: 609 active2026-09-12: 604 active2026-09-13: 601 active2026-09-14: 599 active2026-09-15: 601 active2026-09-16: 596 active2026-09-17: 597 active2026-09-18: 595 active2026-09-19: 598 active2026-09-20: 592 active2026-09-21: 589 active2026-09-22: 585 active2026-09-23: 591 active2026-09-24: 593 active2026-09-25: 596 active2026-09-26: 595 active2026-09-27: 591 active2026-09-28: 527 active2026-09-29: 510 active2026-09-30: 499 active2026-10-01: 494 active2026-10-02: 492 active2026-10-03: 494 active2026-10-04: 492 active2026-10-05: 491 active2026-10-06: 492 active2026-10-07: 493 active2026-10-08: 494 active2026-10-09: 494 active2026-10-10: 491 active2026-10-11: 489 active2026-10-12: 488 active2026-10-13: 497 active2026-10-14: 497 active2025-06-302026-10-14

# y-axis starts at 64.88, 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
▼ -17.03%
-102 domains
90 days
▼ -26.59%
-180 domains
1 year
▼ -11.09%
-62 domains
# intermediate CAs
Intermediate certificate authorities operating under Hellenic Academic and Research Institutions CA, with the number of active domains each currently secures.
intermediatecountrydomains
HARICA DV TLS RSAGreece482
HARICA Institutional TLS RSA 2Greece14
HARICA EV TLS RSA 2Greece1
HARICA EV TLS RSA SubCA R1Greece0
HARICA Institutional TLS RSAGreece0
# faq
? How many domains does Hellenic Academic and Research Institutions CA secure?
Hellenic Academic and Research Institutions CA is the certificate authority for 497 active domains as of October 14, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is Hellenic Academic and Research Institutions CA gaining or losing market share?
The number of domains secured by Hellenic Academic and Research Institutions CA has shrunk by 11.09% over the last year (-62 domains).
? Which intermediate CAs does Hellenic Academic and Research Institutions CA sign from?
We have seen 5 intermediates under Hellenic Academic and Research Institutions CA, the busiest being “HARICA DV TLS RSA” with 482 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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