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

kayzerinternet.com · 193.33.29.2:443

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=kayzerinternet.com
Issuer
C=US O=Let's Encrypt CN=R11
Valid from
2025-05-25T08:36:45+00:00
Expires
2025-08-23T08:36:44+00:00
Days remaining
-438
Serial (hex)
06D61BB4F56B5737F6222E41539D2CAE1981
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:kayzerinternet.com, DNS:www.kayzerinternet.com

SHA-256 fingerprint

12:A6:09:6B:4D:CD:CB:C7:18:74:B5:8E:60:24:5D:D3:9F:0C:D2:C0:D9:7E:56:09:E6:D3:EB:B0:69:D2:48:5C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
09:37:C3:AE:E5:9C:7A:83:26:E8:AC:79:B2:21:E4:4F:4D:3B:A6:C0
authorityKeyIdentifier
C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
CA Issuers - URI:http://r11.i.lencr.org/
subjectAltName
DNS:kayzerinternet.com, DNS:www.kayzerinternet.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r11.c.lencr.org/2.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : ED:3C:4B:D6:E8:06:C2:A4:A2:00:57:DB:CB:24:E2:38: 01:DF:51:2F:ED:C4:86:C5:70:0F:20:DD:B7:3E:3F:E0 Timestamp : May 25 09:35:16.006 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:57:7C:B3:A0:0D:97:F8:CD:B5:82:24:D3: E5:DF:68:DB:4D:A7:FB:39:60:1A:2F:05:A8:85:D7:43: 32:6E:37:05:02:20:48:71:7C:90:DF:3F:D0:67:29:71: 5F:AB:6E:66:3D:E4:1F:3A:78:C5:A2:14:52:47:B5:C1: A6:6D:C3:0A:A9:B6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 12:F1:4E:34:BD:53:72:4C:84:06:19:C3:8F:3F:7A:13: F8:E7:B5:62:87:88:9C:6D:30:05:84:EB:E5:86:26:3A Timestamp : May 25 09:35:16.025 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:24:EE:DB:DD:1A:DB:AB:A8:DB:FC:98:7B: 2C:59:5C:90:B3:5F:2D:FE:27:3D:77:E4:B2:4D:39:83: 1F:26:B5:86:02:20:1F:4E:2C:F0:A6:19:46:E4:2F:FE: B3:1F:49:46:42:54:19:27:61:61:33:D2:F5:F5:EF:10: 54:CC:2B:89:82:3E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T08:13:06+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R11
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
128
Serial (hex)
8A7D3E13D62F30EF2386BD29076B34F8
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

59:1E:9C:E6:C8:63:D3:A0:79:E9:FA:BE:14:78:C7:33:9A:26:B2:12:69:DD:E7:95:21:13:61:02:4A:E3:1A:44
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
C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
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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