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

telefonica-ca.net · 81.88.48.71:443

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
The certificate expires within 30 days.

Certificate verification failed

Subject
C=IT ST=Firenze O=Register spa CN=*.dadapro.com
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA OV R36
Valid from
2025-10-09T00:00:00+00:00
Expires
2026-10-26T23:59:59+00:00
Days remaining
21
Serial (hex)
1F67FB67DC26BD4E53C674EF6920E57F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.dadapro.com, DNS:dadapro.com

SHA-256 fingerprint

06:E0:E7:9E:80:37:A5:93:81:4F:E7:E4:16:E4:5E:67:7F:BF:D4:36:CA:F6:BA:5F:BE:23:51:DF:88:78:21:10
Certificate extensions & PEM
authorityKeyIdentifier
E3:66:74:BB:70:68:8D:2C:5D:4E:0E:A6:4A:8F:9B:37:22:9C:82:92
subjectKeyIdentifier
F9:EF:7D:B3:13:73:D6:A7:3E:BA:6D:5A:FE:82:03:62:08:ED:C4:68
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.1.3.4 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.dadapro.com, DNS:dadapro.com
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 9 10:02:55.785 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:75:85:63:96:1A:53:FA:B6:51:9B:DE:50: DB:8E:89:E6:83:0D:70:A0:90:FC:DC:72:FD:AE:0E:2E: 43:57:29:87:02:20:24:3D:A3:FB:57:E1:EC:99:39:7C: 62:EC:BE:83:A4:FD:F2:2F:22:D5:55:11:DF:D5:B4:FF: CC:71:A0:0C:92:E9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Oct 9 10:02:55.875 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:90:7A:70:18:7F:F3:3E:61:49:36:AD: D0:DB:15:63:E0:CC:41:3A:53:3F:19:DE:E7:7A:D5:7E: BB:C2:DD:D1:A0:02:21:00:91:C5:C8:B5:D7:72:F4:87: CF:39:AF:7E:6F:1D:C6:75:7D:54:61:33:7C:C7:E5:7B: C5:6A:35:08:DF:82:45:FB Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Oct 9 10:02:55.692 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:1E:7A:C6:01:60:D2:43:F5:3D:22:EB:BA: 70:D7:10:26:55:DA:66:AD:60:E8:4D:6D:FD:6A:F0:05: B9:3E:0A:C9:02:20:7D:CD:11:89:C8:31:6C:EC:B3:38: F4:95:F5:0E:1D:E5:93:E3:C0:D6:C9:11:87:AE:67:D8: F8:E7:A4:2F:BF:30
-----BEGIN CERTIFICATE-----
MIIHDDCCBXSgAwIBAgIQH2f7Z9wmvU5TxnTvaSDlfzANBgkqhkiG9w0BAQsFADBg
MQswCQYDVQQGEwJHQjEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQD
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shfX0qJcLuExXOJK+Jmtq/WrhzlcKiNdbLOQy7AxOtE=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-05T12:27:13+00:00

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

View certificate JSON

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