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.hostko.si · 185.53.12.3:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `mail.hostko.si'
The certificate expires within 30 days.

Certificate verification failed

Subject
CN=hostko.si
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2025-10-30T00:00:00+00:00
Expires
2026-11-29T23:59:59+00:00
Days remaining
19
Serial (hex)
5B6F8FA3EAFD378940ECF3D547A856A7
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:hostko.si, DNS:www.hostko.si

SHA-256 fingerprint

57:41:9E:A6:F3:9D:2C:2B:07:D7:CB:2F:83:5E:45:68:BA:EE:03:AC:7C:06:BE:09:47:96:40:09:9B:12:26:6D
Certificate extensions & PEM
authorityKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
subjectKeyIdentifier
8F:BF:55:D1:D3:9A:A7:CA:10:FA:0E:E3:2A:3D:93:13:37:5F:F7:0C
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:hostko.si, DNS:www.hostko.si
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Oct 30 13:25:46.657 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:64:A3:EE:A8:4C:52:9A:DD:B4:B0:51:64: 4C:FA:8B:C7:0C:74:95:F7:1E:32:00:82:A7:9B:4A:E3: FD:7B:16:0F:02:20:4E:A4:9A:06:40:DA:13:1B:B0:06: D6:1A:D2:02:98:4A:57:C9:DA:2D:19:52:17:45:D4:BA: 12:50:CD:53:F5:77 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Oct 30 13:25:46.836 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:CC:A6:80:AF:6E:C4:2F:F3:D2:EF:6F: C5:EB:71:63:B0:72:2C:0D:C8:5D:69:82:C3:F4:65:F2: F7:7C:ED:4A:61:02:21:00:E7:F3:1D:2F:1B:97:5B:B0: B3:14:86:E6:17:86:FF:26:BA:6A:11:A2:27:91:9F:EB: E9:97:C1:F3:B8:D2:CF:98 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Oct 30 13:25:46.632 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:D6:12:18:90:7C:3B:42:06:0A:B2:20: 88:CC:84:AC:B5:8B:19:D3:8F:C7:38:D0:CB:25:0D:EB: 38:40:A2:62:A0:02:20:07:A5:F9:FB:EA:A4:CF:EC:02: 2E:18:8E:CE:A5:1B:94:0C:F5:2B:32:07:48:3C:81:4D: 12:55:52:F7:78:E5:15
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-10T15:56:06+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2021-03-22T00:00:00+00:00
Expires
2036-03-21T23:59:59+00:00
Days remaining
3419
Serial (hex)
397A66CC2756362E0DAA87CA6EABE3B1
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

8C:54:C3:34:B6:6B:A4:E4:26:77:2A:F4:A3:F9:13:6C:19:A1:AE:C7:29:FD:B2:8C:53:5C:07:A5:A4:EF:22:E0
Certificate extensions & PEM
authorityKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
subjectKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootR46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootR46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Issuer
C=GB ST=Greater Manchester L=Salford O=Comodo CA Limited CN=AAA Certificate Services
Valid from
2021-03-22T00:00:00+00:00
Expires
2028-12-31T23:59:59+00:00
Days remaining
782
Serial (hex)
E37CA2E9701E339C2F3FB0ED360FF90A
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CE:75:58:0B:C6:79:6D:3B:3E:A2:C3:E7:42:59:D0:D4:03:07:24:08:E9:60:C7:71:39:C2:FB:5A:3D:94:19:E4
Certificate extensions & PEM
authorityKeyIdentifier
A0:11:0A:23:3E:96:F1:07:EC:E2:AF:29:EF:82:A5:7F:D0:30:A4:B4
subjectKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/AAACertificateServices.crl
authorityInfoAccess
OCSP - URI:http://ocsp.comodoca.com
-----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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