Intermediate CAValid (2607 days left)

PostSignum Qualified CA 4

Czech Republic · Published by Digitální a informační agentura (DIA) — Digital and Information Agency, Czech eIDAS supervisory body and national Trusted List scheme operator

Download .pem Back to Czech Republic

The issuer "PostSignum Root QCA 4" is not present in this mirror, so the chain below starts at this certificate.

Certificate chain

Trust path from the root down to this certificate.

PostSignum Qualified CA 4Intermediate CA

Certificate fields

Subject (CN): PostSignum Qualified CA 4
Issuer (CN): PostSignum Root QCA 4
Role: Intermediate CA
Key algorithm: RSA-4096
Validity: Valid (2607 days left)
Valid from: Sep 27, 2018, 07:39 a.m. UTC
Valid to: Sep 27, 2033, 07:39 a.m. UTC
Serial number: 1011
SHA-256: 4779ba66c768fe7e5a5bb74a225fa8b69cd6942af481355630e5ad78b34dff2b
Decentralized ID (did:pki): did:pki:cz:eska-pota-sp:postsignum-qualified-ca-4Resolve →
This CA is addressable as a did:pki decentralized identifier, derived from its subject and resolvable to a W3C DID Document.
CRL: http://crl.postsignum.cz/crl/psrootqca4.crl
http://crl2.postsignum.cz/crl/psrootqca4.crl
http://crl.postsignum.eu/crl/psrootqca4.crl
OCSP: http://ocsp.postsignum.cz/OCSP/RQCA4/
File: postsignum-qualified-ca-4.pem

Provenance

This certificate is public data published by Digitální a informační agentura (DIA) — Digital and Information Agency, Czech eIDAS supervisory body and national Trusted List scheme operator. This site mirrors and structures it; it is not the issuing authority. The SHA-256 fingerprint above is provided as tamper evidence: recompute it against the downloaded .pem to confirm integrity.

Mirror snapshot generated Jul 23, 2026, 06:57 p.m. UTC.