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.tgtserver.com · 103.110.80.11:443

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

Certificate verification failed

Subject
CN=*.c7.pw
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2025-12-16T08:28:18+00:00
Expires
2027-01-15T08:28:17+00:00
Days remaining
108
Serial (hex)
09AA1476287089ABC9726DACF0CD6EBD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.c7.pw, DNS:c7.pw

SHA-256 fingerprint

A6:5B:B4:B6:96:C4:F7:FD:29:25:F7:BA:2F:67:16:2B:41:70:65:DA:A7:DD:EF:F2:B0:02:F9:45:7A:E0:34:46
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:*.c7.pw, DNS:c7.pw
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Dec 16 08:28:18.860 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:44:CC:D3:30:DC:0C:49:E1:81:10:8E:BA: 93:1C:AD:12:A6:7E:CB:F5:57:D9:BF:8E:BA:9A:7E:BC: EE:8D:3A:A3:02:20:05:AB:66:48:EA:B3:18:06:84:B7: 40:64:9B:B4:EF:09:51:7F:53:08:FC:EE:14:E1:D1:A1: F7:C3:6F:A7:65:D7 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 16 08:28:19.081 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:FC:AD:01:47:17:81:79:CC:19:D0:C8: 8A:7A:C8:20:E4:11:5E:81:D4:BC:68:9A:A8:3B:9D:E4: 79:BE:1E:61:7F:02:21:00:FC:46:98:E0:96:0A:64:76: A9:27:F0:77:EB:73:97:E3:73:EE:6D:8E:2D:29:93:D0: B2:D5:B3:34:A8:BB:24:B3 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 16 08:28:18.911 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:CF:57:AD:5E:3E:05:5B:71:37:3E:50: 73:D4:8E:53:AA:72:63:75:3D:9C:27:81:3D:2E:A9:37: BD:CC:2D:16:3F:02:21:00:EF:0C:6D:B0:1C:E9:86:1A: 29:95:30:04:73:0B:27:84:8F:2B:A4:C8:75:1C:65:C6: F4:6C:26:5D:7F:0B:83:87
-----BEGIN CERTIFICATE-----
MIIHATCCBOmgAwIBAgIQCaoUdihwiavJcm2s8M1uvTANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNTEyMTYwODI4
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DCFCZCou14U33krUcI4n9LhTQjFyrkV+neucKbHxXwpUTbTrG1UrAgMBAAGjggMR
MIIDDTAMBgNVHRMBAf8EAjAAME8GA1UdHwRIMEYwRKBCoECGPmh0dHA6Ly9jZXJ0
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Ki5jNy5wd4IFYzcucHcwggF/BgorBgEEAdZ5AgQCBIIBbwSCAWsBaQB1AETCvQzp
FA5kpclKAZMKWqG7NZcOAO4RFoloKhxE17VmAAABmyZGSCwAAAQDAEYwRAIgRMzT
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f1MI/O4U4dGh98Nvp2XXAHcAHJ9oLOn68EVpUPgbloqH3dsyENhM5siy44JSSsTP
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Qd47zYvs1MlvgMmmmvTTEarW/ImQZyAREGQzdL4MUGf1cQPI6FWZ1+eY87sPT5QV
N0vLNqfGYeISw8VGfrRzS+dN41wi6u99egCmx8AR2mSwO3qK5Ax+jVwIUChPieph
PGiXJ8HP5cA+RcWGDfeVc3dasI02RRQW6DiBiFtck+uhnqYr+ACDi9t8lJcSkBoE
gQgvSdFCYvqI3HpPFkrlnBdTCrLFXkywb0AXnSk+RphG53XHQQWaKwZ9vNLh0rHw
whFWS9S35BqmNzToE32kq5X4+Ccr
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-28T10:22:45+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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