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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

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
2026-10-20T09:27:50+00:00
Expires
2027-04-19T00:00:00+00:00
Days remaining
158
Serial (hex)
4F631DA8BA9527BBE14FEE7AF571320F
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

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

SHA-256 fingerprint

76:32:7D:4F:45:B0:38:07:49:2B:53:A6:E9:15:59:D4:64:8D:82:4A:9E:92:7C:6E:65:0C:6C:25:C4:46:40:1F
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 : 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 : Oct 20 09:27:51.995 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:8E:8C:83:69:84:C5:73:CA:21:85:52: 98:33:63:EE:29:04:B8:82:DD:45:76:A8:E6:EB:4A:84: 46:2A:08:14:95:02:21:00:81:CB:85:73:5C:C1:92:03: C8:CF:83:19:57:8B:A1:56:F2:F9:7C:D5:92:96:DC:B4: B7:BD:46:F4:44:D4:B2:43 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 : Oct 20 09:27:52.043 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A5:F9:C4:70:20:9D:03:2F:8A:03:60: 42:41:42:88:F1:28:A2:97:7B:E8:64:FF:7F:DF:06:A0: 2E:C5:C8:24:2C:02:20:4C:11:1D:D7:F6:4C:E1:49:1F: 31:96:E8:52:1E:C5:7B:63:85:02:53:30:EF:D7:A8:61: 39:E9:75:07:17:8A:30 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 : Oct 20 09:27:52.779 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:30:BE:92:C3:B6:14:15:A7:D0:A9:0B:1B: D4:D1:EC:56:29:1F:03:E7:44:90:15:8B:41:9D:26:96: 87:27:1F:0B:02:21:00:F7:A9:21:55:34:BD:25:B4:F1: 5B:88:E9:89:12:AF:64:58:3C:61:01:01:F2:6F:3E:FF: 3C:12:61:68:32:0C:CF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-11T21:57:03+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
1006
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
5978
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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