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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

zimbra.meerfarbig.net · 193.32.220.82:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`mail.meerfarbig.net' did not match expected CN=`zimbra.meerfarbig.net'

Certificate verification failed

Subject
CN=mail.meerfarbig.net
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-08-01T06:49:27+00:00
Expires
2026-10-30T06:49:26+00:00
Days remaining
36
Serial (hex)
06ED9833674AF0DB0F0612A26699E48257FB
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mail.meerfarbig.net

SHA-256 fingerprint

82:A8:7A:A8:E0:DB:BB:A9:10:14:F6:4B:70:53:4B:8A:46:66:3C:E5:55:2B:2B:A0:1E:13:78:9A:53:53:62:02
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
96:DE:80:22:FE:79:8E:B1:EE:FE:B7:6B:FC:CF:A6:00:0D:C2:50:9D
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:mail.meerfarbig.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/124.crl
ct_precert_scts
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 : Aug 1 07:47:57.993 2026 GMT Extensions: 00:00:05:00:18:F7:ED:9F Signature : ecdsa-with-SHA256 30:46:02:21:00:EA:2E:0F:31:60:31:27:35:B8:B3:F8: 4C:51:BB:20:7F:48:ED:70:AA:E7:50:8C:6C:5D:50:80: 34:F0:B0:86:A0:02:21:00:E4:E7:DE:A5:CD:39:34:A8: D3:AD:13:46:37:54:6B:A3:55:D3:FB:E2:79:F0:64:4D: 26:59:5B:28:BC:95:02:BC 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 : Aug 1 07:47:58.186 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:13:5D:2F:62:A1:58:DC:AA:37:ED:F7:11: 65:ED:5E:92:58:F8:8F:34:E4:47:4C:32:EA:D5:E1:DF: 5A:A5:5F:08:02:21:00:FF:8C:59:9E:BE:72:65:1A:67: C2:AE:ED:9A:23:4E:52:7F:0F:97:3C:35:F1:73:51:21: 2B:D2:77:BA:BC:F4:9A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-23T10:39:47+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
710
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2171
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
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/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----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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