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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.sptelecom.pt · 167.235.169.140:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`*.sitedns.pt' did not match expected CN=`mail.sptelecom.pt'

Certificate verification failed

Subject
CN=*.sitedns.pt
Issuer
C=NL O=Trust Provider B.V. OU=Domain Validated SSL CN=Trust Provider B.V. TLS RSA CA G1
Valid from
2025-11-17T00:00:00+00:00
Expires
2026-11-20T23:59:59+00:00
Days remaining
50
Serial (hex)
0DDE627F18DC5A5676FEC82270561DD2
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.sitedns.pt, DNS:sitedns.pt

SHA-256 fingerprint

1E:1C:3A:28:B3:80:29:50:FA:DA:22:6F:23:3A:3A:8F:D3:24:30:C7:32:25:55:C2:A7:39:B0:1D:BD:6D:C9:8C
Certificate extensions & PEM
authorityKeyIdentifier
F5:56:22:1F:D9:BF:6B:59:24:52:B0:E1:6A:CD:C0:E1:57:67:E9:E8
subjectKeyIdentifier
23:44:2C:6E:9F:DF:95:1B:0D:7C:79:7F:37:3D:05:A6:F3:2D:88:32
subjectAltName
DNS:*.sitedns.pt, DNS:sitedns.pt
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://cdpd.digitalcertvalidation.com/TrustProviderBVTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://statusd.digitalcertvalidation.com CA Issuers - URI:http://cacerts.digitalcertvalidation.com/TrustProviderBVTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
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 : Nov 17 09:55:31.500 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A3:29:A4:B7:7C:78:8C:0A:92:F8:B7: 22:FE:0B:C4:48:31:62:A8:EB:5C:67:67:97:A7:0E:65: 5D:7F:2C:F9:CE:02:20:20:E6:7E:26:19:46:4D:83:CA: E6:52:67:A3:F1:DD:D2:D6:31:80:61:2E:5B:0F:DF:E9: 61:7D:41:4F:38:27:FC 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 09:55:31.507 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:9E:AA:C2:44:91:4C:86:C3:4C:54:AB: 80:0A:07:A8:E0:EA:39:91:78:10:A6:A0:AE:14:73:CF: 8E:6F:C2:93:FD:02:20:6C:3D:16:CD:E0:FE:27:D7:DD: BB:83:6C:9A:63:3F:B5:6A:4A:A6:15:83:39:AE:CD:38: EB:9B:9E:89:88:A8:9C 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 : Nov 17 09:55:31.523 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C4:26:C4:85:48:BC:C0:66:B0:C1:B7: 1B:68:76:3A:19:76:89:28:2C:C8:F5:36:B7:14:B6:F9: 4D:93:1A:BC:C3:02:20:17:ED:68:FC:13:81:05:22:26: 7B:34:CF:20:60:4A:7F:58:A0:35:70:FA:E2:97:7F:90: DE:45:01:42:52:6C:6C
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-01T10:41:38+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=NL O=Trust Provider B.V. OU=Domain Validated SSL CN=Trust Provider B.V. TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:25:10+00:00
Expires
2027-11-02T12:25:10+00:00
Days remaining
397
Serial (hex)
0EC411EDF002F73036C4E5D42F3E34F2
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

00:98:71:C3:A4:C6:07:31:1E:5A:E9:2F:01:09:5F:9B:F7:61:00:B8:79:4A:B0:A9:A5:21:0E:67:94:C8:60:7C
Certificate extensions & PEM
subjectKeyIdentifier
F5:56:22:1F:D9:BF:6B:59:24:52:B0:E1:6A:CD:C0:E1:57:67:E9:E8
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.1.2 CPS: https://www.digicert.com/CPS Policy: 2.23.140.1.2.1
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2013-08-01T12:00:00+00:00
Expires
2038-01-15T12:00:00+00:00
Days remaining
4124
Serial (hex)
033AF1E6A711A9A0BB2864B11D09FAE5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:3C:CB:B7:60:31:E5:E0:13:8F:8D:D3:9A:23:F9:DE:47:FF:C3:5E:43:C1:14:4C:EA:27:D4:6A:5A:B1:CB:5F
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
-----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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