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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

TLSv1.2

tktelekom.pl · 87.204.19.151:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=*.tktelekom.pl
Issuer
C=US O=DigiCert Inc CN=RapidSSL TLS DV RSA Mixed SHA256 2020 CA-1
Valid from
2022-02-02T00:00:00+00:00
Expires
2023-02-17T23:59:59+00:00
Days remaining
-1339
Serial (hex)
0A80099186127F7F1EB73CF2B4CECD63
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.tktelekom.pl, DNS:tktelekom.pl

SHA-256 fingerprint

02:B5:8C:85:DC:A8:31:A8:E0:62:7D:F0:07:5D:73:D4:51:AB:8F:01:7E:64:11:85:A3:59:B6:30:DE:B8:06:49
Certificate extensions & PEM
authorityKeyIdentifier
A4:8D:E5:BE:7C:79:E4:70:23:6D:2E:29:34:AD:23:58:DC:F5:31:7F
subjectKeyIdentifier
3E:F1:61:44:F7:33:6C:E7:DD:E2:0E:F0:A3:49:1A:C2:BA:A2:ED:26
subjectAltName
DNS:*.tktelekom.pl, DNS:tktelekom.pl
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl Full Name: URI:http://crl4.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AD:F7:BE:FA:7C:FF:10:C8:8B:9D:3D:9C:1E:3E:18:6A: B4:67:29:5D:CF:B1:0C:24:CA:85:86:34:EB:DC:82:8A Timestamp : Feb 2 12:56:04.063 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:6C:D1:97:4F:9C:6A:32:E8:10:17:56:6D: E4:79:3C:E6:4A:A8:35:C4:5B:F7:F9:64:57:BA:6E:F4: 15:62:4F:87:02:20:15:B0:7F:37:C5:96:97:7E:43:E8: 70:75:EA:B8:1C:60:89:00:02:F5:A4:E8:D2:E0:AE:3D: 14:E4:65:9C:C2:B4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 35:CF:19:1B:BF:B1:6C:57:BF:0F:AD:4C:6D:42:CB:BB: B6:27:20:26:51:EA:3F:E1:2A:EF:A8:03:C3:3B:D6:4C Timestamp : Feb 2 12:56:04.028 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:41:50:E9:25:C8:21:05:B2:C0:F9:29:10: 8D:16:9F:AB:F4:24:51:B6:6A:E6:BF:E0:62:93:43:34: 94:E9:58:7F:02:20:12:87:76:4B:19:FA:71:75:AD:E9: 12:13:33:A2:FF:52:00:7A:07:6C:39:77:B2:31:60:2D: 06:EE:F4:BB:62:4A Signed Certificate Timestamp: Version : v1 (0x0) Log ID : B3:73:77:07:E1:84:50:F8:63:86:D6:05:A9:DC:11:09: 4A:79:2D:B1:67:0C:0B:87:DC:F0:03:0E:79:36:A5:9A Timestamp : Feb 2 12:56:04.051 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F0:3C:CA:3A:BC:69:CF:B8:1A:C8:0C: 5B:A5:AA:27:E4:9C:CF:04:A0:C3:CD:9C:C0:3E:3D:E0: 2B:7D:FE:3C:F5:02:20:5E:F6:D7:54:5A:12:80:AB:87: F0:E3:21:F5:E7:24:0A:2F:16:C4:9C:78:F3:86:7F:73: 4D:A0:1F:C9:A9:DC:DE
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-18T14:42:22+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=RapidSSL TLS DV RSA Mixed SHA256 2020 CA-1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root CA
Valid from
2020-07-16T12:25:27+00:00
Expires
2023-05-31T23:59:59+00:00
Days remaining
-1236
Serial (hex)
07983603ADE39908219CA00C27BC8A6C
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

E6:FA:48:4A:85:89:40:D1:01:97:85:55:45:4A:A4:66:53:1A:B6:C4:AB:C4:AD:2B:00:06:26:AA:AC:0D:04:F9
Certificate extensions & PEM
subjectKeyIdentifier
A4:8D:E5:BE:7C:79:E4:70:23:6D:2E:29:34:AD:23:58:DC:F5:31:7F
authorityKeyIdentifier
03:DE:50:35:56:D1:4C:BB:66:F0:A3:E2:1B:1B:C3:97:B2:3D:D1:55
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootCA.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalRootCA.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS User Notice: Explicit Text: Any use of this Certificate constitutes acceptance of the Relying Party Agreement located at https://www.digicert.com/rpa-ua
-----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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