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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.kcix.net · 66.85.7.21:443

Verified

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

Subject
CN=mail.kcix.net
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-01T20:28:10+00:00
Expires
2026-12-30T20:28:09+00:00
Days remaining
51
Serial (hex)
0591D21AEF664200691FB0B4D6632ABA5638
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mail.kcix.net, DNS:webmail.kcix.net

SHA-256 fingerprint

21:E3:51:6F:E4:32:97:9C:6D:8D:02:06:EC:E0:85:AA:F0:AE:6C:71:2C:D9:1C:4B:82:2D:3C:69:76:08:58:26
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
9C:A9:5E:08:B8:2D:99:20:62:D6:34:25:22:45:BE:7A:75:87:11:D3
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:mail.kcix.net, DNS:webmail.kcix.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/57.crl
ct_precert_scts
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 : Oct 1 21:26:41.053 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F8:AC:9D:17:9B:E2:0F:4D:9E:F7:C3: B1:1E:D3:BB:F9:FE:B8:23:05:87:1C:A1:DF:8D:ED:B1: ED:84:B3:E0:80:02:20:2D:83:33:14:4E:2F:72:CC:B9: 2C:59:03:B7:16:89:66:DD:53:D8:E9:16:F0:EE:66:CB: E9:CB:A8:86:70:1A:44 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Oct 1 21:26:41.629 2026 GMT Extensions: 00:00:05:00:47:4D:2D:4E Signature : ecdsa-with-SHA256 30:44:02:20:07:FA:10:C2:2D:4A:BA:22:28:69:5B:6E: 4F:F0:60:5F:24:02:EC:E4:54:62:D8:2A:38:1A:28:5D: 89:47:03:F4:02:20:59:3D:2C:94:19:CD:DA:30:0E:18: 04:6D:29:51:CF:7D:D4:0A:81:77:66:47:88:37:B2:9A: 8A:75:17:9D:AA:AC
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-09T01:46:13+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
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
663
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
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
2124
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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