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

mail0.smartnet.kz · 79.142.50.21:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
CN=*.smartnet.kz
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-02-06T00:00:00+00:00
Expires
2027-03-08T23:59:59+00:00
Days remaining
138
Serial (hex)
238336BCCF6D79F65FF471FC319843D2
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.smartnet.kz, DNS:smartnet.kz

SHA-256 fingerprint

26:FE:44:04:D9:44:69:69:D9:59:17:4F:60:FB:91:78:D3:BB:63:6A:6A:A9:EF:5A:30:C7:70:9E:4F:BD:3B:60
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
0F:A6:44:6C:A9:01:AE:6F:7E:74:66:E5:B1:B7:4A:4C:2A:FB:70:D7
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client 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:*.smartnet.kz, DNS:smartnet.kz
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Feb 6 09:51:11.383 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:81:C3:E1:D2:8F:B0:B2:1D:D0:EA:00: 3F:EF:F2:F2:A8:C5:86:B9:66:69:9F:67:71:AA:34:1C: B2:F5:ED:93:01:02:21:00:AF:03:34:0C:89:A7:7E:84: 15:F6:7D:C4:A2:A0:93:C9:25:AF:66:97:E2:8E:A5:A0: 7C:4A:B1:88:93:2F:EE:0B Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Feb 6 09:51:12.186 2026 GMT Extensions: 00:00:05:00:02:66:60:33 Signature : ecdsa-with-SHA256 30:46:02:21:00:C8:B5:E6:8C:77:E8:F9:A3:06:16:9D: 3C:6F:E8:7C:04:22:77:68:18:CE:EB:46:20:10:DE:45: 33:AF:7D:D1:A5:02:21:00:F8:6A:95:19:4A:FA:73:1B: 6E:D6:73:CD:68:E7:5E:C9:D7:9C:CF:E5:FA:E4:87:81: 45:8E:A1:04:4D:18:6C:5A Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Feb 6 09:51:11.434 2026 GMT Extensions: 00:00:05:00:00:22:BC:3A Signature : ecdsa-with-SHA256 30:45:02:21:00:E3:4B:75:D0:4C:3E:6D:8D:66:5F:88: C1:A0:5C:98:EE:08:EE:3B:08:82:1A:A6:34:44:7F:73: EB:FF:26:9D:60:02:20:39:DB:E6:12:09:26:CB:E1:B9: C2:05:83:48:1E:AF:C0:9C:04:58:23:1A:4D:C9:2A:C8: AB:E7:4E:04:75:EC:E5
-----BEGIN CERTIFICATE-----
MIIGkjCCBPqgAwIBAgIQI4M2vM9tefZf9HH8MZhD0jANBgkqhkiG9w0BAQsFADBg
MQswCQYDVQQGEwJHQjEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQD
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bReWxjjN
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-21T15:02:43+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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