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

hfu.edu.tw · 210.59.110.3:443

Verified

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

Subject
C=TW ST=Taiwan L=New Taipei O=Huafan University CN=*.hfu.edu.tw
Issuer
C=TW O=TAIWAN-CA CN=TWCA Secure SSL Certification Authority
Valid from
2026-02-13T07:57:48+00:00
Expires
2027-03-11T15:59:59+00:00
Days remaining
128
Serial (hex)
47EA00000008E51559596C928C4A0D13
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.hfu.edu.tw, DNS:hfu.edu.tw

SHA-256 fingerprint

01:B3:35:A4:F6:3B:5F:31:92:5A:61:42:A7:D8:FB:2F:AD:8B:CB:69:B4:1E:DB:A3:CD:8F:0E:5C:61:C3:52:31
Certificate extensions & PEM
authorityKeyIdentifier
92:E7:FA:62:16:71:8C:F3:97:71:42:C6:06:A7:E0:46:61:4B:5C:B6
subjectKeyIdentifier
5D:47:18:66:86:09:35:F1:A5:CD:02:6B:12:C7:E6:1E:00:58:0B:FE:23:53:98:1A:E4:60:D4:24:75:A1:D2:D8
crlDistributionPoints
Full Name: URI:http://sslserver.twca.com.tw/sslserver/Securessl_revoke_sha2_2023G3.crl
subjectAltName
DNS:*.hfu.edu.tw, DNS:hfu.edu.tw
authorityInfoAccess
CA Issuers - URI:http://sslserver.twca.com.tw/cacert/secure_sha2_2023G3.crt OCSP - URI:http://twcasslocsp.twca.com.tw/
certificatePolicies
Policy: 1.3.6.1.4.1.40869.1.1.21 CPS: https://www.twca.com.tw/ Policy: 2.23.140.1.2.2
basicConstraints
CA:FALSE
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
ct_precert_scts
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 : Feb 13 07:57:50.065 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A1:D6:CE:C3:FD:C3:4D:43:89:63:36: 22:07:56:9B:8F:35:C9:A2:74:86:C1:06:4A:F9:9F:19: BE:15:BB:93:5F:02:21:00:EE:02:BF:8C:2B:B5:DF:4C: 62:F6:BD:64:70:F5:0E:20:83:99:4E:A1:92:9B:52:BD: 77:59:03:CC:AB:1E:D8:F3 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Feb 13 07:57:49.774 2026 GMT Extensions: 00:00:05:00:02:AC:4F:9F Signature : ecdsa-with-SHA256 30:44:02:20:52:19:64:3D:EA:3A:56:23:85:3A:78:4E: 24:0A:4E:6F:2B:3D:B3:8B:99:0A:54:02:98:56:CE:81: 9B:2C:3D:F6:02:20:56:84:E7:6B:C4:16:E4:CF:38:1B: 2E:C1:E8:E6:87:DB:8E:1C:D0:36:A4:4A:0F:EE:69:8D: BC:52:81:7A:FB:E1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Feb 13 07:57:49.314 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C7:66:A0:14:2E:8C:C8:AE:82:E8:87: 83:44:FA:D4:70:D6:8C:0B:D4:5E:C8:8E:1B:7D:04:BB: 46:D1:1B:A5:EE:02:20:27:08:22:5A:17:61:74:37:09: FC:A4:51:87:64:DB:AC:6F:5E:34:29:84:30:CF:52:AD: 4D:2B:74:A2:32:A7:23
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-11-02T18:22:31+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=TW O=TAIWAN-CA CN=TWCA Secure SSL Certification Authority
Issuer
C=TW O=TAIWAN-CA OU=Root CA CN=TWCA Global Root CA
Valid from
2023-10-16T09:01:04+00:00
Expires
2030-10-16T15:59:59+00:00
Days remaining
1443
Serial (hex)
400134B3680000000000000CD0AA08EC
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

1A:2C:75:FD:09:6E:04:99:E9:FF:6A:C7:4E:52:6F:61:EA:AE:3E:DF:C8:C2:EA:44:36:FE:E0:C2:4D:8B:7D:0E
Certificate extensions & PEM
authorityKeyIdentifier
48:DB:CD:DE:8E:E9:49:72:5A:88:E8:B1:D8:3D:07:B3:B9:6B:66:50
subjectKeyIdentifier
92:E7:FA:62:16:71:8C:F3:97:71:42:C6:06:A7:E0:46:61:4B:5C:B6
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.40869.1.1.21 CPS: https://www.twca.com.tw/ Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://rootca.twca.com.tw/TWCARCA/global_revoke_4096.crl
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
CA Issuers - URI:http://sslserver.twca.com.tw/cacert/root4096.crt OCSP - URI:http://rootocsp.twca.com.tw/
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=TW O=TAIWAN-CA OU=Root CA CN=TWCA Global Root CA
Issuer
C=TW O=TAIWAN-CA OU=Root CA CN=TWCA Root Certification Authority
Valid from
2014-10-28T07:38:31+00:00
Expires
2030-10-28T15:59:59+00:00
Days remaining
1455
Serial (hex)
40013353E40000000000000CCA5D1B69
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

8A:D4:7F:6D:70:A4:4F:A8:0A:F0:F9:31:12:5F:FE:3A:76:87:6F:FA:D2:19:A4:D4:0A:13:C0:38:DC:85:E6:9E
Certificate extensions & PEM
authorityKeyIdentifier
6A:38:5B:26:8D:DE:8B:5A:F2:4F:7A:54:83:19:18:E3:08:35:A6:BA
subjectKeyIdentifier
48:DB:CD:DE:8E:E9:49:72:5A:88:E8:B1:D8:3D:07:B3:B9:6B:66:50
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy CPS: http://www.twca.com.tw/
crlDistributionPoints
Full Name: URI:http://RootCA.twca.com.tw/TWCARCA/revoke_2048.crl
basicConstraints
CA:TRUE
authorityInfoAccess
OCSP - URI:http://rootocsp.twca.com.tw/
-----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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