DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

citimedia.pl · 89.161.143.158:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=*.citimedia.pl
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-08-17T16:12:05+00:00
Expires
2027-03-04T16:12:04+00:00
Days remaining
131
Serial (hex)
4E244D5604A9CCEB99483F4CB67FCE20
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.citimedia.pl, DNS:citimedia.pl

SHA-256 fingerprint

49:CE:01:F4:4C:E7:56:49:CD:01:1E:E6:AE:9D:02:D0:5E:22:59:6E:F2:2F:EB:CD:A6:80:AC:94:F4:E4:BB:E8
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.citimedia.pl, DNS:citimedia.pl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Aug 17 16:12:05.864 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:F8:6A:DE:38:60:21:BF:A0:0F:0C:72: B7:7A:86:07:6C:C8:C5:8E:A1:B9:7C:A9:9A:28:B4:19: C6:CF:CC:7A:EF:02:21:00:C9:B1:B8:ED:B6:3A:5E:99: B3:0F:84:E2:B8:33:2F:D3:9D:D0:8D:00:E9:A6:95:8C: 1B:0C:88:56:5B:FB:88:C7 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Aug 17 16:12:05.945 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C8:AB:30:F3:A8:48:3B:21:E6:AB:5C: 46:C6:25:84:99:B8:BC:40:EC:FD:95:00:D2:E9:A4:48: 71:55:A5:B7:E0:02:20:33:1A:C3:22:70:E8:79:AC:89: 6D:B6:E5:F3:83:37:83:BB:B4:C1:F0:AE:04:61:D8:30: E0:CA:C6:DD:94:BF:F8 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Aug 17 16:12:06.151 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0E:04:D7:C7:7B:4E:AD:AE:C4:65:96:3E: 48:FB:A8:56:90:69:EC:6B:B3:7B:E9:10:D4:47:C8:70: CA:56:EB:0E:02:21:00:98:05:62:7B:07:2A:92:C9:57: 00:5A:FC:49:87:91:77:C8:F6:55:54:FA:BC:C1:69:DD: 47:92:E1:E5:D9:DA:43
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-24T12:33:31+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2024-06-18T07:41:22+00:00
Expires
2039-06-05T07:41:22+00:00
Days remaining
4606
Serial (hex)
A82DD9E5DCAFDF13205E70043E6B95A8
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:C0:A5:A7:68:44:C8:40:DF:AF:82:0F:FD:02:AD:F6:57:3A:26:82:3E:F6:AF:75:8A:33:84:A0:AC:04:40:83
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/ctrca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/ctrca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2018-03-16T12:10:13+00:00
Expires
2043-03-16T12:10:13+00:00
Days remaining
5986
Serial (hex)
1EBF5950B8C980374C06F7EB554FB5ED
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

FE:76:96:57:38:55:77:3E:37:A9:5E:7A:D4:D9:CC:96:C3:01:57:C1:5D:31:76:5B:A9:B1:57:04:E1:AE:78:FD
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
keyUsage
Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

Registration / WHOIS →DNS records →