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

TLSv1.2

starnettelecom.pl · 188.65.40.69:443

Verified

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

Subject
CN=*.starnettelecom.pl
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-06-24T13:56:19+00:00
Expires
2027-01-09T13:56:18+00:00
Days remaining
76
Serial (hex)
047AE8D4EE7BBE68D89EB961E32D0DE6
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.starnettelecom.pl, DNS:starnettelecom.pl

SHA-256 fingerprint

4B:52:CF:69:6C:95:11:37:D9:2F:55:9C:9B:4C:24:71:82:01:17:85:CF:F0:A2:0E:7C:59:D8:DC:9A:33:E7:5B
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:*.starnettelecom.pl, DNS:starnettelecom.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 : Jun 24 13:56:19.846 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:7E:6F:D0:FC:6F:48:69:00:0F:2E:E2:39: 3A:C7:C3:9F:48:22:19:33:7E:20:41:2B:28:0F:BD:FB: 79:8D:68:02:02:20:2C:BE:FF:23:24:26:2C:2B:CD:D8: 7D:62:CD:D0:9A:BB:CB:9D:68:C0:5E:21:EC:9B:8B:EE: CE:2D:41:BF:8F:D4 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 : Jun 24 13:56:19.897 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:BB:83:0A:0D:AA:A8:40:86:21:C8:C2: 4A:49:A7:4A:05:DF:F4:72:B9:A7:B6:04:7B:E2:8D:F6: DC:A5:05:DE:8F:02:20:76:10:82:A0:4F:65:13:BA:4E: EA:F9:41:0D:B7:1E:92:5A:55:D0:08:34:92:0F:27:6C: 9B:FC:0B:14:2E:3D:F7 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 : Jun 24 13:56:20.158 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:6B:81:64:D1:17:08:0D:C9:5D:BB:88:A6: F4:8F:D2:86:B2:DF:DC:FE:55:F7:1D:B4:30:81:6C:F8: AD:1E:FD:32:02:20:7C:7E:39:40:7C:92:76:E1:C6:A5: E9:78:34:06:BD:9D:B9:74:82:AF:57:A3:81:F5:80:22: 7C:A8:4B:89:69:5C
-----BEGIN CERTIFICATE-----
MIIHIjCCBQqgAwIBAgIQBHro1O57vmjYnrlh4y0N5jANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNjA2MjQxMzU2
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MQYDVR0RBCowKIITKi5zdGFybmV0dGVsZWNvbS5wbIIRc3Rhcm5ldHRlbGVjb20u
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ENhM5siy44JSSsTPWZ8AAAGe+ergPgAABAMARjBEAiBrgWTRFwgNyV27iKb0j9KG
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YbHNkkqioFZY4LFOqyVne5RHrqTa0e7Ib+JwuJu7CjX9nVXs8+H1fEPHkkbXZapi
8Rhb2/R8fSCDCthkbph3MTh37WnVZme5tijybGlcx6rEeBcO7i3Xp1Rj7S7c50aI
tzbGtAL+ET0h1dO7L2FC3MShusdi5+zYuqVUbsMeMtGcJ/OwfN7TyAG8reWON9AS
A57R+8d8cRV7cTVMZMUaBC+PscKdbl+oawhvtZAkMg3YBDKZnmHJ6jzQh+yOckCS
Y867BPaj3x4M0PE/tnEKbVuJ0oxmN7G6dudZDCrrLn6FrVly2T1IKDDXiaUGVsj5
r569MV9n1XM8suJG8Xd/rKmOCO12wFTIw1YAABaIWXqsh8anH5jWavffQEt1YMrP
3AIiVftH1wT8AxDRGuJxfI2eU1kRmHHsLuA606LWsxWXw/Yz2psVXQ6/KfmAoU+Y
AurtovaK
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-25T00:54:58+00:00

Server-presented chain · 1 additional certificate

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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H5o7DtoGiWXvcRKYpGtWt9czdUa1edSk5mTrwZGEXLAkX1ECiAq4GS5vEGjrEQ1u
x8mag2LDh7ZnXdcyzkKZKGsx7uExe3Nx5gWWZMXFrZ5v+uxynKogHUY2vdIMB3dn
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PtYwxP1nNpxwBgtIPoTk6wIDAQABo4IBRDCCAUAwcQYIKwYBBQUHAQEEZTBjMDcG
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MB8GA1UdIwQYMBaAFIz7HHW8AtOfTi5I2flgVKrEs0/6MBIGA1UdEwEB/wQIMAYB
Af8CAQAwNQYDVR0fBC4wLDAqoCigJoYkaHR0cDovL3N1YmNhLmNybC5jZXJ0dW0u
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Xx8kJKIebBTjbiID3zANBgkqhkiG9w0BAQ0FAAOCAgEACDQ1ggBelZZ/NYs1nFKW
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pSmHRHI3UWVERDeERca0uJ3I+a5ER9vUL9u5ilGG4afyx7QwzitBG+1rU3nRsHyZ
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Omwtipvq0EL1iocJhXdlsG+jIUVs/Sl/Um9JiZV+h/MoytnrPrWMIj+0zz6BdaPP
2sT6wcLzpnwYcE9FWSbQrzNpL283EOUkObjc8AIxICzPHGusF0IqsO+sj9XzvLTh
TjKfFlzx4NR8gbK7m8sXq6cgP4UAtyvDswebFIRQiuhjqOT9G7+56+4zC0RaEZx/
LwoFE+ObVXxX674szQvIc+7WPCooVsUbwZIikzJqZb4gJQ1OQx23CgyyYlsPHIDN
8FpPkganuCwy++7umTkM7+Q=
-----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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