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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.ktsolutions.it · 185.232.238.217:443

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 has expired.

Certificate verification failed

Subject
CN=mail.ktsolutions.it
Issuer
C=US O=Let's Encrypt CN=R3
Valid from
2024-04-09T21:07:39+00:00
Expires
2024-07-08T21:07:38+00:00
Days remaining
-809
Serial (hex)
049F45F3E572C29EBD16B54A69E0F0FA5D0A
Signature
RSA-SHA256
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:mail.ktsolutions.it

SHA-256 fingerprint

DA:40:52:AD:21:7D:68:2D:A4:EF:06:1D:11:CB:3C:30:6A:B6:57:AB:E4:F9:FB:EB:83:92:AD:FC:06:78:D4:5F
Certificate extensions & PEM
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
B7:F0:0A:49:CC:EF:85:09:71:3F:F3:98:7B:CD:94:BD:3A:86:47:20
authorityKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
OCSP - URI:http://r3.o.lencr.org CA Issuers - URI:http://r3.i.lencr.org/
subjectAltName
DNS:mail.ktsolutions.it
certificatePolicies
Policy: 2.23.140.1.2.1
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 3F:17:4B:4F:D7:22:47:58:94:1D:65:1C:84:BE:0D:12: ED:90:37:7F:1F:85:6A:EB:C1:BF:28:85:EC:F8:64:6E Timestamp : Apr 9 22:07:40.263 2024 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E1:48:D8:39:D1:5F:27:FF:D8:C0:C0: E1:FB:02:97:69:86:28:57:21:9C:D2:7A:6D:EA:32:AD: 6F:AE:ED:EF:F9:02:21:00:B6:24:6E:D5:45:13:2B:C3: 35:D0:1C:4D:F7:BF:BE:D6:27:B6:EC:F3:75:EF:E6:E6: E6:F9:84:06:2E:B9:4C:9E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 19:98:10:71:09:F0:D6:52:2E:30:80:D2:9E:3F:64:BB: 83:6E:28:CC:F9:0F:52:8E:EE:DF:CE:4A:3F:16:B4:CA Timestamp : Apr 9 22:07:40.297 2024 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:04:30:20:E9:24:DD:DC:59:66:F3:27:6D: 08:72:E3:7F:1E:05:89:57:B5:FC:04:0B:8B:05:26:8D: 63:E6:E1:42:02:21:00:A7:EB:5F:36:AF:7F:F8:20:3A: 59:A1:06:FA:9C:04:89:99:2E:67:F9:33:B6:82:F5:A7: 5A:0E:6E:82:AF:3B:97
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-25T01:42:28+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R3
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2020-09-04T00:00:00+00:00
Expires
2025-09-15T16:00:00+00:00
Days remaining
-375
Serial (hex)
912B084ACF0C18A753F6D62E25A75F5A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

67:AD:D1:16:6B:02:0A:E6:1B:8F:5F:C9:68:13:C0:4C:2A:A5:89:96:07:96:86:55:72:A3:C7:E7:37:61:3D:FD
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1
-----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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