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

TLSv1.2

dns6.proen.co.th · 202.170.119.19:443

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
The certificate has expired.

Certificate verification failed

Subject
CN=dns6.proen.co.th
Issuer
C=US O=Let's Encrypt CN=R3
Valid from
2021-01-12T04:49:12+00:00
Expires
2021-04-12T04:49:12+00:00
Days remaining
-2032
Serial (hex)
04680E73BFC015B3123220EF71A27AE466B9
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:dns6.proen.co.th

SHA-256 fingerprint

48:04:48:10:1D:2B:E2:7B:74:CC:F6:1A:CD:C4:92:8F:33:58:D9:4C:2A:71:41:12:30:44:08:BC:2C:FB:F9:F4
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
36:D0:99:F8:C0:9F:3D:4E:25:D5:86:EE:1D:4E:E9:2D:3C:58:18:15
authorityKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
OCSP - URI:http://r3.o.lencr.org CA Issuers - URI:http://r3.i.lencr.org/
subjectAltName
DNS:dns6.proen.co.th
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1 CPS: http://cps.letsencrypt.org
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E: E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3 Timestamp : Jan 12 05:49:13.001 2021 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4D:46:16:A1:26:02:E9:9A:81:2B:AB:B9: 4E:7B:15:53:DA:38:6B:94:AD:A9:06:DB:D4:33:7E:2B: 2A:43:B2:D0:02:20:74:7C:86:9A:BD:8B:07:0A:86:C1: BC:CF:F1:93:2A:24:4C:21:12:AD:5D:AE:B3:1B:AE:BF: 66:83:AD:DE:B1:16 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:20:BC:1E:8E:D5:8D:6C:88:73:1F:82:8B:22:2C:0D: D1:DA:4D:5E:6C:4F:94:3D:61:DB:4E:2F:58:4D:A2:C2 Timestamp : Jan 12 05:49:13.035 2021 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:1B:BA:A1:CF:C1:3E:FE:61:87:9C:58:E7: C6:CC:51:14:EA:69:EF:22:6B:1C:96:A0:27:BE:59:03: D0:F5:DE:A9:02:21:00:98:7F:FE:C5:64:B4:71:3F:D1: 02:FC:E3:50:29:33:EB:5A:5C:DC:BF:C9:F2:55:95:05: B4:15:85:56:4F:08:48
-----BEGIN CERTIFICATE-----
MIIGJTCCBQ2gAwIBAgISBGgOc7/AFbMSMiDvcaJ65Ga5MA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMTAxMTIwNDQ5MTJaFw0yMTA0MTIwNDQ5MTJaMBsxGTAXBgNVBAMT
EGRuczYucHJvZW4uY28udGgwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoIC
AQDJsNEf8lgWeXIYX6MlVZ7pd1g8qCtkWDVe15+v7Bp/zGEOahegCje/U6+rbVyN
JtFQShxYeuMzSWN6Ss3N9+O6yqdK/6lDbpFGG8RGpfAEmPy63yUViSINoX2i7WP9
TTRQdzjVN/9L0McqPyVP/4OZjORTFGjJPQRsrJ/wxTtt6XZW6s04h+LRdTwvEj0N
dE78utBW4boZIgHJvfWUjWwpOr3OJ8HysV5ZdTV5s+A/wDn54cGkJdQiYkOoMLkQ
TAWWS5QHmxfGSysU2yDHsm5JkuglPQxXzCimDauDI4n+X4SFaujnYzSzwBr+UoxQ
5r3vu6iHN7TRjbkVCQcpuIL6xzNikn/7hUArI8RkZNq9upruD+w1EhEvGBcugAbd
OHeyNkxUOsr45DheO73PSczfQqu+4ADfLNXY5b/OcIOYbYmKFLtQ9fBuEFK/GyFI
1zvXaK+DDyCaGasMnR6+DS6eRB3t8bWpYDCAhlHBo0YHLwaEO2dWygh9PH4yoRkW
/mDCeKHOD3Ajz/TGgpyvywRegdk7X7OTdT3KEJQHgqFj0+LPeZoo5TkyNW5Faq4r
Ehw/V6TmWJwWDPgRahXsZfzlrscSuy25FJgtDNJ5nNo8IEq3vSjELrWxUvsBSKeC
XVIC82EXZnU1dDvgDC1yNgCRu2MESBJ5j5XLcZS8KfJVzwIDAQABo4ICSjCCAkYw
DgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAM
BgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQ20Jn4wJ89TiXVhu4dTuktPFgYFTAfBgNV
HSMEGDAWgBQULrMXt1hWy65QCUDmH6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYI
KwYBBQUHMAGGFWh0dHA6Ly9yMy5vLmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0
cDovL3IzLmkubGVuY3Iub3JnLzAbBgNVHREEFDASghBkbnM2LnByb2VuLmNvLnRo
MEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUH
AgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB
9ASB8QDvAHUA9lyUL9F3MCIUVBgIMJRWjuNNExkzv98MLyALzE7xZOMAAAF29SQb
qQAABAMARjBEAiBNRhahJgLpmoErq7lOexVT2jhrlK2pBtvUM34rKkOy0AIgdHyG
mr2LBwqGwbzP8ZMqJEwhEq1drrMbrr9mg63esRYAdgCUILwejtWNbIhzH4KLIiwN
0dpNXmxPlD1h204vWE2iwgAAAXb1JBvLAAAEAwBHMEUCIBu6oc/BPv5hh5xY58bM
URTqae8iaxyWoCe+WQPQ9d6pAiEAmH/+xWS0cT/RAvzjUCkz61pc3L/J8lWVBbQV
hVZPCEgwDQYJKoZIhvcNAQELBQADggEBAEYrJ9NdoFVKrAPS4+Kbb1UA5BPa0xQ2
hO/Lc1m/cM3/UhC7MgEnRiGJxJNLzXpchA7hh4o68aXbnM/v0lXhpjXXWLROJPj+
WOP/YrTQoJMqUTz9fgWV6BDweilf/Dg7CtjFsJvqZgzUDUapDZc/MQRk92ptp7mK
FonWIOmx60RMe1gLpc+r+lGJoxb5ZUs4dBdIraCr9ele2JZXQMkr6o2fyfcct7uO
xwjImCK9k/d9JjSzgiGmzfTjPk1uxG8TySgL/SaiDvR9uV0bbdOSGzAge30H1wvU
DtlFHpjsCrsC/HcvRKM+Sd3u6U5dd97nVcCV0J9iBsoQ2eUADjSl/mI=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-03T09:58:11+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R3
Issuer
O=Digital Signature Trust Co. CN=DST Root CA X3
Valid from
2020-10-07T19:21:40+00:00
Expires
2021-09-29T19:21:40+00:00
Days remaining
-1861
Serial (hex)
400175048314A4C8218C84A90C16CDDF
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

73:0C:1B:DC:D8:5F:57:CE:5D:C0:BB:A7:33:E5:F1:BA:5A:92:5B:2A:77:1D:64:0A:26:F7:A4:54:22:4D:AD:3B
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
keyUsage
Digital Signature, Certificate Sign, CRL Sign
authorityInfoAccess
CA Issuers - URI:http://apps.identrust.com/roots/dstrootcax3.p7c
authorityKeyIdentifier
C4:A7:B1:A4:7B:2C:71:FA:DB:E1:4B:90:75:FF:C4:15:60:85:89:10
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1 CPS: http://cps.root-x1.letsencrypt.org
crlDistributionPoints
Full Name: URI:http://crl.identrust.com/DSTROOTCAX3CRL.crl
subjectKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
-----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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