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.sunucun.us · 212.64.193.212:443

Verified

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

Subject
CN=webmail.sunucun.us
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-08T06:01:46+00:00
Expires
2026-12-07T06:01:45+00:00
Days remaining
32
Serial (hex)
0682DEBEA2C866CBD040F74D4B36D64610C0
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:autoconfig.sunucun.us, DNS:autodiscover.sunucun.us, DNS:cpanel.sunucun.us, DNS:cpcalendars.sunucun.us, DNS:cpcontacts.sunucun.us, DNS:mail.sunucun.us, DNS:sunucun.us, DNS:webdisk.sunucun.us, DNS:webmail.sunucun.us, DNS:www.sunucun.us

SHA-256 fingerprint

54:EB:49:7D:6F:28:C8:0C:A6:A7:6D:FD:88:F7:FE:0E:5B:74:F0:D1:39:EB:66:2C:94:6F:0D:4D:A0:81:E8:4E
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
78:ED:A1:D4:63:E8:B0:31:70:95:5B:F0:1D:6F:3B:F1:5A:E2:9D:B0
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:autoconfig.sunucun.us, DNS:autodiscover.sunucun.us, DNS:cpanel.sunucun.us, DNS:cpcalendars.sunucun.us, DNS:cpcontacts.sunucun.us, DNS:mail.sunucun.us, DNS:sunucun.us, DNS:webdisk.sunucun.us, DNS:webmail.sunucun.us, DNS:www.sunucun.us
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/65.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Sep 8 07:00:16.628 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:43:02:20:23:EC:25:1A:F0:2A:27:4D:43:D5:2D:5D: 70:B0:5F:42:E4:A3:D1:C0:D3:1D:24:66:CA:6C:2D:A2: F2:C3:9C:50:02:1F:35:8D:3F:49:E6:31:3D:1A:B6:AD: 49:15:E5:21:02:7D:9E:4E:45:6C:46:C7:21:67:E4:B0: 8D:2D:BE:9D:68 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 : Sep 8 07:00:17.563 2026 GMT Extensions: 00:00:05:00:3D:E5:F2:E7 Signature : ecdsa-with-SHA256 30:44:02:20:68:A9:D5:02:60:25:F3:2A:43:EC:5C:32: 77:6D:B6:D4:15:8D:EC:9C:EB:D5:A5:72:30:AD:BD:83: C4:86:7D:FC:02:20:41:42:6B:9D:42:97:8E:46:D1:99: 79:35:D5:7D:37:67:C4:B1:8A:29:3F:41:2A:3B:63:2D: AE:52:09:95:81:EE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-04T11:31:22+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
668
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-----
MIIE2zCCAsOgAwIBAgIRAKICU/FfJpHAXcHOE7m8yk4wDQYJKoZIhvcNAQELBQAw
LjELMAkGA1UEBhMCVVMxDTALBgNVBAoTBElTUkcxEDAOBgNVBAMTB1Jvb3QgWVIw
HhcNMjUwOTAzMDAwMDAwWhcNMjgwOTAyMjM1OTU5WjAzMQswCQYDVQQGEwJVUzEW
MBQGA1UEChMNTGV0J3MgRW5jcnlwdDEMMAoGA1UEAxMDWVIxMIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoVi8X2xCYgMXvJxNPKp/oF13UMgmPABB07VC
LNDtoXmt9luEZNJSBV10VyT1Pz6LD8Zq1d2gc43WNl1AdRrj4sEnazbOiz0nPpmG
Bp2hui49oZtDIY6wdKeZAi5BbNU20CH6RSBBMLSQ9cXrH8dxdv4PAJ45ssGML68U
SE3BsjC2a6cAN9L5CgXVIQi5tfNiTPoFZZ3S0OlXqLmmtdV95udWAb5b6e/F49Di
CsH0Y00Ag72BVIb1hzynmKe+X0mERBTtsb3BwmpV9ipeBjMLoR/D9cHxHQCWoi5l
TmXwY015J5rGelz1nZjJuxc2kioaX29XJBnhMkP531rSdG5uMwIDAQABo4HuMIHr
MA4GA1UdDwEB/wQEAwIBhjATBgNVHSUEDDAKBggrBgEFBQcDATASBgNVHRMBAf8E
CDAGAQH/AgEAMB0GA1UdDgQWBBQfLzW+RhSCzUCxrnksVXj699Ro+zAfBgNVHSME
GDAWgBTe51tg0CJtQCh9Pw0B/qS1UrRRlDAyBggrBgEFBQcBAQQmMCQwIgYIKwYB
BQUHMAKGFmh0dHA6Ly95ci5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwB
AgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3lyLmMubGVuY3Iub3JnLzANBgkq
hkiG9w0BAQsFAAOCAgEA0+zvMq3kHig1ddTmmm+RibTr9/RpX7k4buanMMRqbV/y
IvP82zAHN3mvaw+cASuVsdpd0ikjhr4hnhJQLQOzOp2ccKrsdGOAgo0vddeISFAq
EWEV4lmUM3vFF796up+bSgmJ1u6RupDCMxDgF8M3eLvGuj6L0lu3zkQ0KuQLnKxL
tB0oQqn1Idg5CuuGpMvQzk29Pa3D/qHurc0EIM9SxukQuJqq63lxsYyRQFU8yMBO
hq1w5LbfaWNRrz1uklOfI/pYkAb2E2MTZrAMQkBIE2S8Jt1F8gRc96o/xOsrgvSk
a84AisX6xq1lz1Z7jGvrnXc4TMcjxZTjiTaihcYI1JIXZiLtEMSCa5l3cu8YWd6z
dLRQlqRdclVjuQfNHawRJ6GWlkK0QJosivTKwdBw3KxEtzGo8yMHERbsy57gP1UX
HOMcmZYQC0gtyR3SxfenIM/MxC3Ia2Ypab/kQ/CTnlIn2KQ5JUC6NYrGCbhFN9bp
5lKJStEwCUnLpntcrXk5XVDCNv/5RyWpRThkGOV7GetKkQ0qAY8hCzWK6oqnAhDZ
cjlYVdWfqOw3DIOX6EDNBgAqHarRVxyF9QZdOaXSyPJ0ueD2BYJEBgaCGQ8rAaU/
Qc123V5LTXDZW4CcsPBDyhy4v+c8hClAyw/IkJlfBqxB9D+/wvIMHgECZ4ptP6o=
-----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
2129
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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