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

fiberopticalnetwork.com · 185.168.156.2:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=fiberopticalnetwork.com
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-31T07:29:18+00:00
Expires
2027-01-29T07:29:17+00:00
Days remaining
77
Serial (hex)
06AF2F828C17B61B226D98E40635BAB5B3C9
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:fiberopticalnetwork.com, DNS:mail.fiberopticalnetwork.com, DNS:webmail.fiberopticalnetwork.com, DNS:www.fiberopticalnetwork.com

SHA-256 fingerprint

6D:22:4D:6A:42:3F:19:41:84:6A:9F:0F:52:F5:92:F4:90:83:4C:5F:12:96:A7:AD:19:B3:CB:D4:10:FA:89:37
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
78:7F:10:B6:B1:39:EE:CF:1D:FB:19:06:E8:FE:A7:12:D0:58:ED:9C
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:fiberopticalnetwork.com, DNS:mail.fiberopticalnetwork.com, DNS:webmail.fiberopticalnetwork.com, DNS:www.fiberopticalnetwork.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/74.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Oct 31 08:27:49.079 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:2F:6E:95:E6:27:CB:2C:93:36:97:61:08: E5:02:DC:4B:5B:ED:56:AD:A6:75:D6:F3:DE:11:47:E6: 2F:9D:95:0A:02:20:4B:5F:36:03:3B:F1:5B:1A:D6:CE: 08:84:CB:7D:FE:64:E7:F2:38:67:7A:A0:55:89:F9:3B: B5:CF:EA:15:5E:76 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Oct 31 08:27:49.244 2026 GMT Extensions: 00:00:05:00:18:E4:71:68 Signature : ecdsa-with-SHA256 30:45:02:21:00:F7:24:0D:3E:17:6A:55:75:FE:F5:9A: FE:DA:13:80:D8:2C:60:67:51:70:13:5C:0A:CB:19:75: 43:57:B1:EE:86:02:20:1C:85:81:21:94:4A:F9:00:2F: FE:97:A0:09:3D:F3:6B:44:44:79:AE:11:ED:E2:F8:D7: 82:E8:08:E0:0A:25:A2
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-12T09:09:55+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
660
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2121
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
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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