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

r1servers.com · 185.80.2.93:443

Verified
The certificate expires within 30 days.

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

Subject
CN=autoconfig.r1servers.com
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-21T08:09:19+00:00
Expires
2026-11-19T08:09:18+00:00
Days remaining
29
Serial (hex)
0682D0872063E4318C85610BCF37CA042DE3
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:autoconfig.r1servers.com, DNS:autodiscover.r1servers.com, DNS:cpanel.r1servers.com, DNS:cpcalendars.r1servers.com, DNS:cpcontacts.r1servers.com, DNS:mail.r1servers.com, DNS:r1servers.com, DNS:webdisk.r1servers.com, DNS:webmail.r1servers.com, DNS:www.r1servers.com

SHA-256 fingerprint

C0:90:C6:21:F0:5D:CB:C3:C8:07:8C:99:DC:8D:93:EE:E6:84:6C:17:A6:52:57:B3:03:B7:16:32:CD:74:51:9C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
F5:2E:F4:9F:EC:07:28:64:F7:AB:AF:75:99:AA:61:3B:09:8B:AE:CA
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.r1servers.com, DNS:autodiscover.r1servers.com, DNS:cpanel.r1servers.com, DNS:cpcalendars.r1servers.com, DNS:cpcontacts.r1servers.com, DNS:mail.r1servers.com, DNS:r1servers.com, DNS:webdisk.r1servers.com, DNS:webmail.r1servers.com, DNS:www.r1servers.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/100.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Aug 21 09:07:49.189 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:27:60:8A:73:F1:67:41:13:14:7D:D3:82: 0E:E9:45:1D:B5:9B:A9:7A:8F:38:F7:20:E1:46:1E:6C: AC:5A:13:DD:02:21:00:89:AF:8E:CF:B2:A0:62:85:B4: C1:C2:D4:8B:F3:85:01:92:11:8C:F6:9A:DA:12:97:3E: 5F:BE:92:7E:C6:23:9E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Aug 21 09:07:49.691 2026 GMT Extensions: 00:00:05:00:20:4E:69:9F Signature : ecdsa-with-SHA256 30:46:02:21:00:91:7E:47:95:F3:CE:0D:0E:A2:91:3D: E6:8B:C5:4D:B5:F1:FF:5B:79:1E:71:8E:64:FE:CC:96: 2C:EE:2A:E3:E5:02:21:00:FB:E0:5D:F4:85:EB:84:6B: 6F:63:CD:EC:BD:E6:B5:2F:54:DF:6F:B4:4C:14:0F:E3: CA:A4:04:FA:C1:F3:80:BE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-21T04:48:03+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
682
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
2143
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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