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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

netart.pl · 77.55.124.100:443

Verified
The certificate expires within 30 days.

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

Subject
CN=*.netart.pl
Issuer
C=PL O=nazwa.pl Sp. z o.o. CN=nazwaSSL DV TLS G2 E29 CA
Valid from
2026-04-13T06:29:20+00:00
Expires
2026-10-14T00:00:00+00:00
Days remaining
6
Serial (hex)
4A481C404B8FCD46E278B34D1E210998
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:*.netart.pl, DNS:netart.pl

SHA-256 fingerprint

BA:B3:A6:29:77:9C:D7:F0:5F:9C:2A:62:72:73:51:D1:EB:F9:A1:FC:D5:6E:D9:CD:24:84:0F:99:67:75:96:6E
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:*.netart.pl, DNS:netart.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 13 06:29:21.541 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0B:E6:87:80:C5:79:C4:42:21:4A:AD:50: EA:3F:24:B2:A2:5A:7E:31:ED:4A:78:5F:EA:40:FB:91: 82:F8:6C:B6:02:21:00:80:77:88:2A:03:6D:2E:D6:E6: EC:DB:96:E2:63:C2:D8:97:D8:F0:04:6F:19:AB:19:A9: DF:F9:DA:9B:DB:FB:C9 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 13 06:29:21.547 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:86:75:58:77:72:04:08:A8:37:56:4D: 14:F7:FA:0B:AC:A2:E2:49:5B:A0:C2:22:B9:69:A9:C6: F8:F0:DA:F0:E8:02:20:5C:11:9F:38:0E:D6:07:98:C5: 50:F1:FB:F2:A9:2D:5D:37:27:08:3C:09:D9:85:8E:B1: 07:FF:2A:2F:C2:2D:81 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 13 06:29:21.600 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E0:48:7E:B7:83:1A:8C:EA:2F:62:06: 5D:34:E1:2B:9C:11:F0:81:0B:6D:FF:91:3B:C0:B8:66: 88:A9:61:C7:08:02:20:04:07:9B:E1:8B:BF:65:D8:CE: 6B:CE:F8:D4:F1:59:6D:4D:F7:A7:90:84:E4:67:B1:3B: C1:EF:6A:EE:05:74:D9
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-07T17:04:37+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
1041
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
6013
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-----
MIICZTCCAeugAwIBAgIQeI8nXIESUiClBNAt3bpz9DAKBggqhkjOPQQDAzB0MQsw
CQYDVQQGEwJQTDEhMB8GA1UEChMYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEuMScw
JQYDVQQLEx5DZXJ0dW0gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxGTAXBgNVBAMT
EENlcnR1bSBFQy0zODQgQ0EwHhcNMTgwMzI2MDcyNDU0WhcNNDMwMzI2MDcyNDU0
WjB0MQswCQYDVQQGEwJQTDEhMB8GA1UEChMYQXNzZWNvIERhdGEgU3lzdGVtcyBT
LkEuMScwJQYDVQQLEx5DZXJ0dW0gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxGTAX
BgNVBAMTEENlcnR1bSBFQy0zODQgQ0EwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAATE
KI6rGFtqvm5kN2PkzeyrOvfMobgOgknXhimfoZTy42B4mIF4Bk3y7JoOV2CDn7Tm
Fy8as10CW4kjPMIRBSqniBMY81CE1700LCeJVf/OTOffph8oxPBUw7l8t1Ot68Kj
QjBAMA8GA1UdEwEB/wQFMAMBAf8wHQYDVR0OBBYEFI0GZnQkdjrzife81r1HfS+8
EF9LMA4GA1UdDwEB/wQEAwIBBjAKBggqhkjOPQQDAwNoADBlAjADVS2m5hjEfO/J
UG7BJw+ch69u1RsIGL2SKcHvlJF40jocVYli5RsJHrpka/F2tNQCMQC0QoSZ/6vn
nvuRlydd3LBbMHHOXjgaatkl5+r3YZJW+OraNsKHZZYuciUvf9/DE8k=
-----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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