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

ns3.introserv.net · 135.148.64.151:443

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=us.lg.introserv.com
Issuer
C=US O=Let's Encrypt CN=R13
Valid from
2026-01-29T05:05:38+00:00
Expires
2026-04-29T05:05:37+00:00
Days remaining
-162
Serial (hex)
0651CEABA16941E0200345FB4458B3EB64BB
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:us.lg.introserv.com

SHA-256 fingerprint

2A:D8:FF:53:DA:6C:1F:BB:16:A1:B4:AB:39:E1:2C:E7:45:3F:E1:16:63:2B:7D:7D:2D:FE:37:25:6A:F9:2C:FD
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
33:89:D0:64:D9:BB:E3:26:1E:E7:27:CA:81:E7:85:8F:27:05:F5:84
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:us.lg.introserv.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r13.c.lencr.org/60.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 71:7E:95:F3:C2:38:8A:6D:B1:E3:84:49:3D:31:E1:5A: A9:62:08:76:2D:42:00:E0:05:0C:D0:67:B5:A6:61:E2 Timestamp : Jan 29 06:04:08.809 2026 GMT Extensions: 00:00:05:00:08:18:03:9D Signature : ecdsa-with-SHA256 30:45:02:21:00:95:B6:07:86:55:DA:D5:B0:C7:DD:3D: B0:6D:3E:2D:BD:06:A6:B9:39:D2:53:E8:01:3D:3C:03: 43:CF:CB:F9:50:02:20:74:F3:7B:46:BA:FF:42:B2:20: 9A:03:98:8B:98:51:43:56:D3:84:6B:8E:FC:32:21:28: 0D:9C:3D:ED:E7:41:E9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D1:6E:A9:A5:68:07:7E:66:35:A0:3F:37:A5:DD:BC:03: A5:3C:41:12:14:D4:88:18:F5:E9:31:B3:23:CB:95:04 Timestamp : Jan 29 06:04:08.930 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:D8:76:F5:73:F5:DA:9D:EC:F8:2E:CC: F0:89:B7:FB:74:B8:0E:D3:8C:3E:3A:75:4E:96:2D:E2: 78:4A:17:71:0E:02:21:00:BF:B7:1F:D7:3E:B9:06:24: F5:14:5C:83:DD:F9:74:EE:D6:84:49:BE:86:80:D3:03: 64:C3:63:9A:2C:79:A3:C3
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-08T00:29:04+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
155
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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