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

interserver.com.vn · 103.106.105.141:443

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=interserver.com.vn
Issuer
C=US O=Let's Encrypt CN=R13
Valid from
2025-09-20T06:47:53+00:00
Expires
2025-12-19T06:47:52+00:00
Days remaining
-313
Serial (hex)
0574A72F4324C4064D2D344BF79E50ED56AD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:interserver.com.vn, DNS:www.interserver.com.vn

SHA-256 fingerprint

D4:15:C6:89:09:22:75:CA:82:01:18:EB:A8:B8:D8:C7:52:9D:7D:F9:C9:CA:D3:B5:F2:D2:44:9E:9A:0F:95:E1
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
3B:94:9E:4D:D4:14:BD:B1:F4:57:34:3A:6C:85:FE:78:68:36:03:19
authorityKeyIdentifier
E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
CA Issuers - URI:http://r13.i.lencr.org/
subjectAltName
DNS:interserver.com.vn, DNS:www.interserver.com.vn
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r13.c.lencr.org/46.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C: 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0 Timestamp : Sep 20 07:46:24.170 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:39:4E:AC:72:20:02:7A:FF:CF:E0:BE:06: 59:6B:51:08:5F:E9:B1:62:33:2C:08:A9:E5:50:7B:86: 09:FB:AE:51:02:21:00:F2:CE:0B:52:07:BC:EE:04:48: 5D:E5:CE:BF:13:1D:F1:D8:4A:20:CC:50:A9:A7:CA:D6: 34:AA:62:F7:3E:80:01 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 0D:E1:F2:30:2B:D3:0D:C1:40:62:12:09:EA:55:2E:FC: 47:74:7C:B1:D7:E9:30:EF:0E:42:1E:B4:7E:4E:AA:34 Timestamp : Sep 20 07:46:24.171 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:01:88:53:30:33:DD:FB:13:23:A0:D6:4D: 01:25:1B:01:C8:D2:DE:D6:01:0F:E2:06:5B:4B:5E:BC: CF:54:06:78:02:20:7C:8D:42:62:CD:2D:D9:9E:61:E0: A1:EE:4C:07:4F:23:C9:EC:59:21:1C:80:47:2E:EA:18: A2:9A:56:89:10:78
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-27T21:09:26+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R13
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2024-03-13T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
136
Serial (hex)
5A00F212D8D4B480F3924157EA298305
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

D3:B1:28:21:6A:84:3F:8E:F1:32:15:01:F5:DF:52:A5:DF:52:93:9E:E2:C1:92:97:71:2C:D3:DE:4D:41:93:54
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
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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