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

aptg.com.tw · 210.200.64.235:443

Verified
The certificate expires within 30 days.

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

Subject
C=TW ST=Taiwan L=Taipei O=FAR EASTONE TELECOMMUNICATIONS CO., LTD. CN=*.aptg.com.tw
Issuer
C=TW O=TAIWAN-CA CN=TWCA Secure SSL Certification Authority
Valid from
2026-04-01T08:01:27+00:00
Expires
2026-10-16T15:59:59+00:00
Days remaining
9
Serial (hex)
47EA00000009086570428669563B4DC9
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.aptg.com.tw, DNS:aptg.com.tw

SHA-256 fingerprint

B9:30:64:75:2B:51:C2:FE:69:BA:87:E0:7B:FB:03:75:5E:B0:AC:36:64:B6:F2:0B:A2:78:13:5D:D2:0C:4F:1A
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
A5:94:EC:2E:AE:FE:82:FC:43:8C:89:38:92:E7:DB:01:4A:0F:DD:42:B6:3A:D0:8C:0B:2A:F6:7C:A2:E0:B6:F6
crlDistributionPoints
Full Name: URI:http://sslserver.twca.com.tw/sslserver/Securessl_revoke_sha2_2023G3.crl
subjectAltName
DNS:*.aptg.com.tw, DNS:aptg.com.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 : 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 : Apr 1 08:01:28.293 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:96:BC:EB:88:80:53:8F:24:43:50:27: 37:6A:5C:2E:48:16:29:C5:24:04:8E:C7:B2:FB:B3:55: 01:F4:42:65:56:02:20:16:73:EC:DB:28:5E:51:5E:72: 30:A2:B5:D7:A6:70:97:A1:B5:7F:5B:0D:20:B5:BA:CA: 13:08:D6:88:60:CC:E8 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Apr 1 08:01:28.320 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:81:1F:F6:86:10:D5:E4:7C:1B:B6:A7: 85:16:CB:B0:CC:6B:D6:B7:24:91:1C:2F:DB:A8:4D:04: A8:BC:E5:08:F2:02:21:00:99:BA:A9:8D:48:B6:2B:77: E2:1D:74:8E:E7:42:43:49:A9:F8:3B:31:ED:EC:70:36: 0A:09:7A:BB:27:AF:C1:C7 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Apr 1 08:01:28.336 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:01:EF:51:D5:32:EF:FD:62:86:21:93:AC: F9:2C:31:84:E4:42:09:0A:6D:D0:B8:2E:8C:70:CE:43: EA:95:F4:78:02:21:00:E0:BD:20:C8:80:0C:D9:93:0D: BA:5A:DE:77:46:06:24:D8:8A:FE:97:93:62:56:DD:DE: 36:7D:AA:C3:FC:8A:7E 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 1 08:01:28.396 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:18:03:3C:F4:1E:C5:8B:10:BB:F5:32:86: 71:C6:65:40:38:19:75:53:7B:88:31:91:19:4E:D3:CC: 34:D6:D3:B6:02:20:57:F3:03:00:0B:85:2F:F4:76:35: E6:6A:4B:41:11:76:B1:61:02:19:71:CB:A4:7F:E8:E4: 4D:AD:C1:FE:75:FE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-07T15:31:55+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
1470
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 Global Root CA
Valid from
2012-06-27T06:28:33+00:00
Expires
2030-12-31T15:59:59+00:00
Days remaining
1546
Serial (hex)
0CBE
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

59:76:90:07:F7:68:5D:0F:CD:50:87:2F:9F:95:D5:75:5A:5B:2B:45:7D:81:F3:69:2B:61:0A:98:67:2F:0E:1B
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
-----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

Registration / WHOIS →DNS records →