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

twt.com.tw · 203.133.56.15:443

Verified

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

Subject
CN=*.twt.com.tw
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2025-11-17T03:31:55+00:00
Expires
2026-11-17T03:31:54+00:00
Days remaining
32
Serial (hex)
53DFED685DE79183F8A9CEC67A240AF6
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.twt.com.tw, DNS:twt.com.tw

SHA-256 fingerprint

C1:2D:32:79:46:65:FA:D0:D5:64:D5:A0:D1:56:DC:11:2A:D4:8B:11:53:7A:FA:26:64:03:03:C1:9A:09:DC:A9
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:*.twt.com.tw, DNS:twt.com.tw
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Nov 17 03:31:56.790 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:9B:61:96:76:9D:51:8F:72:84:95:F8: DE:AF:7D:FC:B0:B2:DD:CF:52:6F:5C:3F:48:97:87:C5: 57:33:D2:65:D8:02:20:00:C0:A9:B2:2B:B2:67:54:CB: FF:F6:87:EE:92:74:67:C3:E2:79:88:FA:AA:99:7A:41: 2E:B1:37:49:66:77:E9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Nov 17 03:31:56.824 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:D2:38:A8:A8:9C:EC:9A:53:65:ED:6E: A1:C6:44:38:B2:CB:1D:0A:FB:67:6A:25:89:77:F3:5A: A5:F9:32:DF:2D:02:21:00:FC:3E:32:80:A9:B1:23:27: 66:6C:77:5E:0A:44:93:9B:CB:0A:70:78:1F:70:92:F9: 33:5F:17:EA:A7:4E:A5:B0 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 : Nov 17 03:31:56.792 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C7:1C:44:99:E3:D9:95:FD:A4:ED:D2: 47:C0:20:99:EF:D1:FE:03:83:64:AF:A7:6C:74:2A:D3: 50:DD:3A:7D:E9:02:21:00:86:94:FE:DD:01:66:D0:5E: B7:80:1D:97:F0:5F:64:F6:E9:24:C0:7D:8F:D1:01:0E: 49:65:5B:96:B4:3C:7D:39
-----BEGIN CERTIFICATE-----
MIIHETCCBPmgAwIBAgIQU9/taF3nkYP4qc7GeiQK9jANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNTExMTcwMzMx
NTVaFw0yNjExMTcwMzMxNTRaMBcxFTATBgNVBAMMDCoudHd0LmNvbS50dzCCASIw
DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMTqLEMNGuff/SBWqgCO8NOT0FAb
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oEmzc2P4YqnNLQ9HoAYwdVnlE8AhFMFGsSa3Ig9qK0Ko9w4bkFpR5PH7/5Koj+4g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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-SHA384 · Checked 2026-10-15T05:59:38+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
4616
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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-----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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