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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

fibr.net · 172.239.193.217:443

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

Certificate verification failed

Subject
CN=fibr.net
Issuer
C=US O=Let's Encrypt CN=YE1
Valid from
2026-08-19T01:52:52+00:00
Expires
2026-11-17T01:52:51+00:00
Days remaining
55
Serial (hex)
068EACF51C19C35925C9158A5D09BB9C64B8
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:fibr.net

SHA-256 fingerprint

BB:EB:88:A7:43:8C:76:64:9D:8B:7F:DC:2C:9A:AC:58:3D:B4:07:0B:39:A3:E3:3F:5F:F5:E0:33:73:E9:24:42
Certificate extensions & PEM
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
B5:FF:A0:F3:E8:65:23:0B:9D:08:AD:E5:16:0F:02:C2:26:62:6F:D4
authorityKeyIdentifier
BB:20:CA:47:0B:FE:D7:E5:9C:F9:8F:09:2A:A3:8C:37:45:B1:BC:D8
authorityInfoAccess
CA Issuers - URI:http://ye1.i.lencr.org/
subjectAltName
DNS:fibr.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://ye1.c.lencr.org/57.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Aug 19 02:51:22.366 2026 GMT Extensions: 00:00:05:00:36:0B:E9:3C Signature : ecdsa-with-SHA256 30:45:02:21:00:CE:61:B0:C5:DB:4D:CF:E4:B3:10:A4: 98:3A:5C:67:80:E8:67:DA:A6:BC:1A:33:4E:A1:1F:9E: A6:78:CE:42:89:02:20:73:FE:2B:87:0F:14:0B:4D:24: 9A:87:DA:EE:ED:A3:E1:04:19:72:E2:80:E4:32:A4:1E: 2D:78:63:FD:E3:73:04 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Aug 19 02:51:22.366 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:6F:B4:B6:83:A4:E2:15:A7:DF:34:50:99: 66:39:9B:58:3F:C9:4A:F3:58:C4:BC:AC:F8:AC:D8:C2: 14:50:2F:58:02:21:00:A4:0C:05:CD:A9:69:80:D8:A2: 4A:CB:7C:BD:1C:F1:C7:45:97:F2:A2:12:FD:94:1D:A6: FC:89:56:61:7B:33:49
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-22T22:36:01+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YE1
Issuer
C=US O=ISRG CN=Root YE
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
711
Serial (hex)
5DDD70DD31F801C85C186A7A04B80AFE
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

A2:37:2D:06:43:1E:97:16:36:5E:EE:D4:7E:C0:20:35:14:97:D1:82:FC:C0:38:E4:57:E5:81:68:A0:3C:AC:07
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
BB:20:CA:47:0B:FE:D7:E5:9C:F9:8F:09:2A:A3:8C:37:45:B1:BC:D8
authorityKeyIdentifier
A3:C8:26:5A:8E:A1:4C:D0:35:63:FC:9B:23:C8:3A:AE:56:F3:4F:56
authorityInfoAccess
CA Issuers - URI:http://ye.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://ye.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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