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

TLSv1.3

mail.shiftek.fr · 163.5.107.55:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `mail.shiftek.fr'

Certificate verification failed

Subject
CN=mail.avalemonpaf.com
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-29T21:15:04+00:00
Expires
2027-01-27T21:15:03+00:00
Days remaining
87
Serial (hex)
050BF8DDA2F98D5753746B11455340440854
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.remividon.fr, DNS:autodiscover.remividon.fr, DNS:mail.avalemonpaf.com

SHA-256 fingerprint

BC:23:87:A9:69:33:5B:B4:61:54:C8:30:0D:0A:FD:13:86:EF:EF:88:D9:E2:41:99:A1:65:2A:3B:85:7B:1E:2A
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
15:F1:67:DD:9C:D8:BA:1F:EB:D1:EC:3E:97:50:C9:DE:D6:00:77:73
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:autoconfig.remividon.fr, DNS:autodiscover.remividon.fr, DNS:mail.avalemonpaf.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/85.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 29 22:13:34.578 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C9:BF:3D:51:D6:D0:CE:A3:9C:62:D2: D4:65:5E:48:63:FC:B8:8C:8F:D1:DD:4C:6B:46:86:DC: F0:DA:EB:17:18:02:21:00:B1:3D:F0:B2:B8:56:F5:7A: D4:0A:2C:E0:14:F5:3B:B2:C6:92:70:65:2E:71:AA:40: E6:17:DA:87:73:1B:EA:D4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:E8:22:FC:2B:AB:0E:92:EE:D0:E9:FA:D6:96:64:60: 27:76:D0:17:60:E0:89:05:09:C9:23:A1:B0:3F:C3:7F Timestamp : Oct 29 22:13:31.277 2026 GMT Extensions: 00:00:05:00:12:37:0B:9D Signature : ecdsa-with-SHA256 30:45:02:20:74:CA:98:AE:10:1C:56:A8:A7:CF:FB:06: DC:89:8E:75:30:45:D7:FE:D3:BA:FF:FF:F7:1E:59:B2: 87:11:77:1E:02:21:00:CF:0E:16:76:77:CE:A7:BC:B7: 0A:8F:9F:24:28:4D:F0:96:2D:B6:53:19:BF:0D:D9:8F: 52:3A:D4:4C:6A:3F:35
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-01T08:43:50+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
671
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
2132
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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