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

nocsu.com · 185.135.80.149:443

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=nocsu.com
Issuer
C=US O=Let's Encrypt CN=R3
Valid from
2021-12-23T06:46:39+00:00
Expires
2022-03-23T06:46:38+00:00
Days remaining
-1647
Serial (hex)
0375F8F7F75DB06EADBE2B970DB23D225F92
Signature
RSA-SHA256
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:ftp.nocsu.com, DNS:nocsu.com, DNS:www.nocsu.com

SHA-256 fingerprint

64:4E:1F:D3:40:8D:66:D6:50:9A:4D:12:1A:94:93:C2:60:D6:A2:1F:55:80:EF:6D:F5:C9:32:63:22:D8:F6:B9
Certificate extensions & PEM
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
B8:E5:77:3D:C8:21:1C:E0:70:42:38:00:6F:E2:9F:8D:4B:93:39:7C
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:ftp.nocsu.com, DNS:nocsu.com, DNS:www.nocsu.com
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 : 29:79:BE:F0:9E:39:39:21:F0:56:73:9F:63:A5:77:E5: BE:57:7D:9C:60:0A:F8:F9:4D:5D:26:5C:25:5D:C7:84 Timestamp : Dec 23 07:46:39.622 2021 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:FF:C8:22:82:FF:12:AE:4D:44:3E:F3: E5:27:F9:DC:3B:5C:98:FE:00:7A:0F:9F:74:10:94:E1: 81:B3:A3:14:F2:02:21:00:B8:6A:4F:A7:E8:1A:10:D3: 12:4A:6C:35:52:24:D2:46:C7:FF:5A:6C:FB:38:FF:FA: 0C:CC:75:F7:63:ED:D4:05 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : DF:A5:5E:AB:68:82:4F:1F:6C:AD:EE:B8:5F:4E:3E:5A: EA:CD:A2:12:A4:6A:5E:8E:3B:12:C0:20:44:5C:2A:73 Timestamp : Dec 23 07:46:40.112 2021 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:5C:91:86:FE:F5:A7:04:43:FB:8E:F6:20: 21:7C:39:49:12:9B:49:4E:F3:DA:82:81:4B:07:F1:98: F4:D5:CD:C4:02:20:23:71:09:CA:BB:21:56:A0:B3:FF: E2:E1:F9:91:F4:8B:40:EE:2A:23:B5:94:ED:27:E4:94: 2D:32:C7:6B:C7:10
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-24T20:36:36+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R3
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2020-09-04T00:00:00+00:00
Expires
2025-09-15T16:00:00+00:00
Days remaining
-375
Serial (hex)
912B084ACF0C18A753F6D62E25A75F5A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

67:AD:D1:16:6B:02:0A:E6:1B:8F:5F:C9:68:13:C0:4C:2A:A5:89:96:07:96:86:55:72:A3:C7:E7:37:61:3D:FD
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
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
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/
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1
-----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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