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

webmail.diffusionfermont.ca · 142.217.202.230:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
C=CA ST=Quebec L=Fermont O=Diffusion Fermont CN=*.diffusionfermont.ca
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-09-08T00:00:00+00:00
Expires
2027-01-04T23:59:59+00:00
Days remaining
77
Serial (hex)
0E045835013C2F7216AA5A18F82F8C8F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.diffusionfermont.ca, DNS:diffusionfermont.ca, DNS:autodiscover.diffusionfermont.ca, DNS:dc1.diffusionfermont.ca, DNS:mail.diffusionfermont.ca, DNS:webmail.diffusionfermont.ca

SHA-256 fingerprint

A4:E5:4A:CC:FD:FA:EE:1E:E9:86:60:3C:A6:2A:82:2B:2C:D0:C2:F3:8F:41:2E:B5:11:32:01:3A:0C:6E:B1:D6
Certificate extensions & PEM
authorityKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
subjectKeyIdentifier
04:9C:8E:AD:78:BA:DC:15:58:FB:65:90:4E:C0:23:BD:41:64:FF:60
subjectAltName
DNS:*.diffusionfermont.ca, DNS:diffusionfermont.ca, DNS:autodiscover.diffusionfermont.ca, DNS:dc1.diffusionfermont.ca, DNS:mail.diffusionfermont.ca, DNS:webmail.diffusionfermont.ca
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Sep 8 19:40:55.402 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F8:AE:95:A0:A9:87:CC:02:29:34:77: EB:FF:41:44:A1:A4:6E:7A:B0:91:12:FF:42:CA:7E:F8: AC:4E:C7:A8:C4:02:20:5D:F4:95:D1:62:27:0C:AC:F2: 0D:4E:4A:67:5C:49:CA:57:74:38:F2:C6:EA:ED:5F:E3: 0E:B9:9F:07:51:4D:A4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Sep 8 19:40:55.450 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:37:D2:C9:E3:C1:77:39:D6:53:79:54:E8: DB:60:AC:38:C5:55:F1:C7:7F:2B:D0:50:4B:21:44:37: 8A:69:34:9F:02:21:00:A4:99:EB:44:48:4A:4D:5F:74: 09:13:27:2C:4C:A2:41:3F:63:CE:9F:DF:7E:7C:D8:E2: 33:25:A9:C4:CD:BA:43 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Sep 8 19:40:55.610 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:2A:66:10:76:AD:65:42:CD:F8:A0:AB:74: 41:A2:E6:78:83:1A:A3:49:46:F5:51:97:9F:D2:93:89: 53:E2:5F:20:02:21:00:A1:A7:FB:6C:F2:13:42:0C:AB: 1E:ED:48:7C:9D:57:8A:6D:33:29:DF:32:FF:F6:0D:21: 52:04:3E:03:EE:17:8A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-19T15:13:17+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2021-03-30T00:00:00+00:00
Expires
2031-03-29T23:59:59+00:00
Days remaining
1622
Serial (hex)
0CF5BD062B5602F47AB8502C23CCF066
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C8:02:5F:9F:C6:5F:DF:C9:5B:3C:A8:CC:78:67:B9:A5:87:B5:27:79:73:95:79:17:46:3F:C8:13:D0:B6:25:A9
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalRootG2.crt
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.2.3
-----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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