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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.walrus.net · 34.199.104.103:443

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=rosenthal.com
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-04-01T00:00:00+00:00
Expires
2026-10-16T23:59:59+00:00
Days remaining
-22
Serial (hex)
BB6802BF35F16646C5FBB5F77A4AED94
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:rosenthal.com, DNS:www.rosenthal.com

SHA-256 fingerprint

F5:60:E6:8A:D0:8F:A1:CE:EA:A6:B7:F0:35:87:6C:44:A8:50:C6:9F:77:F5:17:F7:20:1F:20:02:0D:EE:65:06
Certificate extensions & PEM
authorityKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
subjectKeyIdentifier
44:4F:DC:0F:7D:CE:70:2F:90:C1:E6:E0:D4:77:B1:E6:35:E9:92:5B
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:rosenthal.com, DNS:www.rosenthal.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Apr 1 17:38:05.571 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:42:69:86:82:2F:7B:6E:01:7C:9D:36:6F: 50:9E:2F:15:8C:60:CF:E7:3D:3D:14:EF:BE:A5:0E:59: E8:2F:D9:42:02:21:00:BA:9E:77:87:1D:16:C0:DF:A2: 61:B0:C4:06:89:00:54:C5:5A:14:4A:E2:9A:4F:B9:27: 40:C3:E9:B5:6F:69:DC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : Apr 1 17:38:05.581 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:34:C8:82:48:B8:EA:98:36:E1:4E:B8:67: 65:32:FB:25:D4:07:4F:ED:53:09:1F:B0:D5:C0:7D:F9: F5:3C:95:42:02:20:26:25:C0:F9:E3:17:A0:67:6D:4B: 0E:99:0C:D9:13:77:96:72:7D:12:94:20:0C:0B:25:8F: 78:54:2C:C9:C0:22 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : Apr 1 17:38:06.151 2026 GMT Extensions: 00:00:05:00:05:50:10:33 Signature : ecdsa-with-SHA256 30:45:02:20:7B:C8:D3:2F:6F:1E:DE:37:D0:73:A4:29: 65:B6:45:86:F5:1B:09:05:FD:6A:21:DF:E3:BE:27:B9: 54:8D:EB:C6:02:21:00:8B:9B:79:5D:63:26:F5:57:A8: EB:61:3D:58:17:90:4F:53:EF:6F:BE:CD:AF:EC:87:67: 15:81:FE:2C:84:61:7A
-----BEGIN CERTIFICATE-----
MIIGjjCCBPagAwIBAgIRALtoAr818WZGxfu193pK7ZQwDQYJKoZIhvcNAQELBQAw
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pzA=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-07T10:54:46+00:00

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

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