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

TLSv1.3

mail.158.hk · 154.223.180.115:443

Verified

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

Subject
CN=mail.158.hk
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2025-12-10T03:35:28+00:00
Expires
2027-01-09T03:35:27+00:00
Days remaining
83
Serial (hex)
4751823751F1EBC9F30ABFEB6A27B86B
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:mail.158.hk

SHA-256 fingerprint

27:6D:BD:68:9B:00:F7:5B:39:62:AC:A7:AC:B4:08:89:F8:E8:1B:58:28:FF:D3:D6:A0:66:42:D8:8A:A8:9B:3D
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:mail.158.hk
ct_precert_scts
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 : Dec 10 03:35:29.224 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:60:F7:F1:6D:D3:89:19:DF:BE:AB:89:15: D8:24:CB:A6:33:0D:79:29:C0:37:3C:F3:A1:02:12:B8: 54:D0:E1:87:02:21:00:9A:DD:13:D7:3A:16:46:02:2B: 52:B3:5D:69:76:65:B3:E4:6E:4B:F1:BF:C1:D1:CD:97: 8A:6E:D7:5B:8C:11:04 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Dec 10 03:35:29.319 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:58:A6:1E:6D:F5:17:98:57:43:EE:8D:BB: 73:1B:19:C3:D5:1F:BC:9F:EE:DE:8A:3E:71:9D:A1:53: 99:67:24:7E:02:21:00:C9:E4:2D:D6:85:19:AD:C6:06: 86:B1:34:9D:7A:8D:ED:FA:81:BE:27:4C:06:63:2B:59: BB:74:45:50:74:CA:65 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 : Dec 10 03:35:29.541 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4C:45:A4:14:48:E9:07:C0:40:6B:B6:42: F7:9F:1E:DE:68:8C:96:FE:4F:33:6E:9C:C4:D1:A1:6A: 19:2F:BB:7D:02:20:06:CF:E5:DE:7D:50:6E:71:C8:FB: E1:CA:43:D6:6D:51:26:BC:13:42:6F:78:6C:2B:E8:C3: 23:9E:D4:DC:C8:71
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-17T17:45:21+00:00

Server-presented chain · 2 additional certificates

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
4613
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-----

Chain certificate 2

Subject
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Valid from
2023-09-19T10:00:00+00:00
Expires
2028-09-19T10:00:00+00:00
Days remaining
702
Serial (hex)
D8E0744B5824919FBD08847DF72020FA
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

FB:13:89:0C:7A:B1:4F:F7:B9:4B:27:14:50:3E:31:12:3B:FD:D3:40:FC:4D:97:97:43:16:6E:04:69:B4:7A:88
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
authorityKeyIdentifier
08:76:CD:CB:07:FF:24:F6:C5:CD:ED:BB:90:BC:E2:84:37:46:75:F7
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/ctnca.crl
authorityInfoAccess
OCSP - URI:http://subca.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/ctnca.cer
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.certum.pl/CPS
-----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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