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.bonet.systems · 185.91.202.114:443

Verified

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

Subject
CN=mail.bonet.systems
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-10T10:25:03+00:00
Expires
2026-12-09T10:25:02+00:00
Days remaining
71
Serial (hex)
06755452BCC29D161A43F82288EE591B1E9B
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.bonet.sk, DNS:autoconfig.ssleek.com, DNS:autodiscover.bonet.sk, DNS:autodiscover.ssleek.com, DNS:mail.bonet.systems

SHA-256 fingerprint

20:32:E0:88:81:68:4E:FD:6B:DA:78:FF:6C:EA:65:1F:19:5F:99:F0:AD:DA:09:AA:F2:8F:8E:D7:7F:3E:17:33
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
5D:AF:24:55:AE:A4:BE:93:61:8A:32:FB:4D:CD:09:0D:90:CD:B2:FA
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.bonet.sk, DNS:autoconfig.ssleek.com, DNS:autodiscover.bonet.sk, DNS:autodiscover.ssleek.com, DNS:mail.bonet.systems
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/28.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 10 11:23:33.295 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:33:7D:29:0B:C9:3D:21:2B:CB:75:BC:D7: FC:18:E2:90:9D:07:6F:5F:B6:2A:CD:41:F9:0E:B7:E3: 4C:37:72:A8:02:20:45:60:F5:5D:A0:6E:9D:E8:C9:31: 0C:64:53:42:49:C3:51:00:70:33:D8:4F:09:AF:3C:6D: 62:DD:71:A3:3A:62 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 : Sep 10 11:23:34.049 2026 GMT Extensions: 00:00:05:00:30:5C:19:A0 Signature : ecdsa-with-SHA256 30:46:02:21:00:BA:E4:DC:15:EA:21:6F:C3:FD:3A:81: F3:D9:04:A8:1D:CC:AE:7A:01:09:18:F9:0B:5B:61:89: 80:8C:C0:9F:A5:02:21:00:AE:DB:1D:7D:5C:01:F5:4A: FA:63:9E:40:FE:64:CC:43:6E:02:AA:42:00:E6:89:9B: 2B:67:19:B3:2C:8F:7E:A2
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T03:07:33+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
704
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
2165
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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