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

bestinternet.co.th · 116.204.180.221:443

Verified

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

Subject
CN=bestinternet.co.th
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-21T08:13:07+00:00
Expires
2027-01-19T08:13:06+00:00
Days remaining
75
Serial (hex)
0631DE7913E6EEA7BC2B033132B3D1991954
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:bestinternet.co.th, DNS:my.bestinternet.co.th, DNS:www.bestinternet.co.th

SHA-256 fingerprint

AF:E2:4C:88:0A:1B:5D:B5:9B:48:37:51:FA:58:50:50:48:99:C6:6A:51:09:5F:FD:69:6D:98:CD:2D:C4:87:B2
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
88:03:40:32:E9:73:36:48:55:0F:36:09:39:AF:4D:BF:63:4E:53:71
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:bestinternet.co.th, DNS:my.bestinternet.co.th, DNS:www.bestinternet.co.th
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/85.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Oct 21 09:11:37.504 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:BD:00:F6:33:1A:D9:91:E3:7A:A0:1E: 11:BA:73:0F:F9:40:2C:53:B6:38:EA:43:42:E8:51:F4: 89:2D:D9:06:00:02:21:00:A3:44:D0:25:BD:EF:4B:FD: E7:33:29:DC:1C:95:18:E3:18:D8:4D:CE:E4:50:7A:1C: 30:3B:2E:D1:B9:13:A2:61 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 : Oct 21 09:11:37.649 2026 GMT Extensions: 00:00:05:00:11:BC:47:EE Signature : ecdsa-with-SHA256 30:45:02:20:78:E8:5D:24:C2:DF:9A:0E:84:0A:34:3B: 82:52:54:7D:81:34:F6:0C:CC:5F:A9:02:7A:99:0F:82: 7D:84:B4:CC:02:21:00:8F:CE:73:6D:BC:8A:94:B9:A0: 58:C6:DC:15:50:10:69:EE:E0:71:E7:FC:5B:D6:7F:5D: 2B:F1:1F:83:31:9B:10
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T11:26:44+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
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
668
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
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-----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==
-----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
2129
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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