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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

sapo.pt · 213.13.145.114:443

Verified
The certificate expires within 30 days.

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

Subject
CN=*.sapo.pt
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Valid from
2025-10-21T00:00:00+00:00
Expires
2026-11-07T23:59:59+00:00
Days remaining
12
Serial (hex)
05A5D0DB9F3F72CC2626326DBC179558
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.sapo.pt, DNS:sapo.pt

SHA-256 fingerprint

2B:64:A6:56:E7:BD:0F:F2:E9:E8:DE:22:20:60:9C:8E:4A:34:C5:7E:6E:A4:7B:B9:64:1E:20:80:66:8A:5C:60
Certificate extensions & PEM
authorityKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
subjectKeyIdentifier
E1:A8:82:76:54:3A:1F:EA:7D:B9:E1:34:F8:E1:E5:74:CD:52:1C:B5
subjectAltName
DNS:*.sapo.pt, DNS:sapo.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
crlDistributionPoints
Full Name: URI:http://cdp.geotrust.com/GeoTrustTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.geotrust.com CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustTLSRSACAG1.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 : Oct 21 16:19:56.311 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:CC:CF:48:89:1D:4E:03:B7:A4:1D:EF: 9A:A8:BD:5E:B2:9D:2A:37:7A:89:C7:E1:54:08:85:75: CB:D9:50:AF:3A:02:21:00:C6:CF:51:B2:D1:04:53:04: D5:91:C5:DC:5E:E7:EF:D7:B0:4C:80:52:6C:57:23:8E: 81:AD:65:02:85:6B:51:54 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 : Oct 21 16:19:56.327 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:FB:15:40:DB:06:BC:7C:8B:EB:90:D9: 20:90:E7:98:96:1B:E1:AB:96:47:2F:D0:7E:20:D0:AD: 4A:A1:BD:84:FE:02:20:4F:47:3B:53:27:8A:1B:EF:07: B7:80:6F:5D:B1:FE:A0:3A:E2:5A:AF:63:A2:5A:B8:80: 33:7A:53:CF:CE:3D:00 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 : Oct 21 16:19:56.339 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A3:E4:DE:1D:FF:C4:37:84:F7:51:33: 11:A1:6E:E9:79:0A:31:60:A9:2A:AF:70:62:39:BE:4C: 13:AB:20:56:96:02:21:00:A5:32:7F:C0:0F:2A:E2:86: 41:AE:CC:21:49:72:07:FF:79:BC:B7:86:9C:7F:BC:8A: 3F:11:DF:3B:C2:F8:22:8D
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-26T13:36:20+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:23:37+00:00
Expires
2027-11-02T12:23:37+00:00
Days remaining
371
Serial (hex)
0D07782A133FC6F9A57296E131FFD179
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C0:6E:30:7F:7C:FC:1D:32:FA:72:A4:C0:33:C8:7B:90:01:9A:F2:16:F0:77:5D:64:97:8A:2E:CA:6C:8A:23:0E
Certificate extensions & PEM
subjectKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
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: X509v3 Any Policy CPS: https://www.digicert.com/CPS
-----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
4098
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.

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