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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

systemia.pl · 46.227.241.51:443

Verified
The certificate expires within 30 days.

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

Subject
CN=*.systemia.pl
Issuer
C=PL O=nazwa.pl Sp. z o.o. CN=nazwaSSL DV TLS G2 E29 CA
Valid from
2026-04-22T14:30:22+00:00
Expires
2026-10-21T00:00:00+00:00
Days remaining
25
Serial (hex)
13AC3B744871E47B49BE6872E019971A
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:*.systemia.pl, DNS:systemia.pl

SHA-256 fingerprint

59:17:1E:C4:F0:F7:64:B0:34:00:04:98:08:4F:2D:0E:35:50:E7:9E:6F:6E:26:3D:64:BB:18:C8:2B:EA:65:7B
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://nazwassldvtlsg2e29ca.crl.certum.pl/nazwassldvtlsg2e29ca.crl
authorityInfoAccess
OCSP - URI:http://nazwassldvtlsg2e29ca.ocsp-certum.com CA Issuers - URI:http://nazwassldvtlsg2e29ca.repository.certum.pl/nazwassldvtlsg2e29ca.cer
authorityKeyIdentifier
A0:EA:D4:0B:0F:49:FA:43:10:E4:5B:BF:C0:23:FF:5C:14:CE:A4:2C
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
subjectAltName
DNS:*.systemia.pl, DNS:systemia.pl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Apr 22 14:30:23.436 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4C:E0:9C:A6:A6:17:6F:07:59:0F:D9:D3: 6A:C6:52:AD:9F:85:18:C6:0A:C4:B8:1B:CA:0E:44:FB: 40:1F:CA:FB:02:20:26:E3:71:CA:5C:EB:0E:28:94:A3: 8E:0D:76:55:D8:FF:68:E0:87:CA:7C:BD:25:A6:D3:B7: 4B:8B:05:08:0B:66 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Apr 22 14:30:23.413 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E4:3B:CF:5B:BA:1B:8C:E0:12:22:86: 61:A2:16:B5:F1:15:B5:BA:B5:6A:6A:51:8B:35:D3:4D: C3:CE:58:7F:A4:02:20:22:BF:9F:AE:92:FE:C4:5A:8D: 0E:09:0D:CB:A4:4B:3B:A2:CC:B9:70:3A:E5:F1:20:0B: 30:F1:AB:DE:27:CF:8D Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Apr 22 14:30:23.463 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:3B:B7:D7:F6:5A:53:8F:00:93:22:D9:C3: 15:A9:CD:2B:E9:6C:6D:99:8B:33:61:7C:CA:2F:DC:54: 46:85:B0:42:02:21:00:A3:9A:5F:FF:44:67:5A:7C:E5: D8:13:4C:2D:E4:AC:B4:49:7B:ED:13:F1:83:01:F5:E5: 2F:2D:FE:B9:39:DE:0F
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-25T11:20:23+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=nazwa.pl Sp. z o.o. CN=nazwaSSL DV TLS G2 E29 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum EC-384 CA
Valid from
2024-08-20T09:37:15+00:00
Expires
2029-08-14T09:37:15+00:00
Days remaining
1053
Serial (hex)
B8FF01A8B6586AF72FE313D2D2B45F14
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

7F:02:E3:51:F8:9B:11:97:41:B0:1D:13:71:CA:1B:9C:14:ED:8B:34:D6:40:BA:44:EF:C3:AB:B9:FE:BB:E7:C8
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/cec384ca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8D:06:66:74:24:76:3A:F3:89:F7:BC:D6:BD:47:7D:2F:BC:10:5F:4B
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/cec384ca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
A0:EA:D4:0B:0F:49:FA:43:10:E4:5B:BF:C0:23:FF:5C:14:CE:A4:2C
-----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 EC-384 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum EC-384 CA
Valid from
2018-03-26T07:24:54+00:00
Expires
2043-03-26T07:24:54+00:00
Days remaining
6025
Serial (hex)
788F275C81125220A504D02DDDBA73F4
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6B:32:80:85:62:53:18:AA:50:D1:73:C9:8D:8B:DA:09:D5:7E:27:41:3D:11:4C:F7:87:A0:F5:D0:6C:03:0C:F6
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8D:06:66:74:24:76:3A:F3:89:F7:BC:D6:BD:47:7D:2F:BC:10:5F:4B
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

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