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

fortetelecom.com.br · 186.237.48.21:443

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=*.fortetelecom.com.br
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign GCC R6 AlphaSSL CA 2025
Valid from
2025-11-16T23:34:37+00:00
Expires
2026-12-18T23:34:36+00:00
Days remaining
72
Serial (hex)
113E5CC3040DA3700C50FF22
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.fortetelecom.com.br, DNS:fortetelecom.com.br

SHA-256 fingerprint

D4:C4:C1:D0:2A:89:5C:8B:2B:71:36:87:1D:F2:83:F1:AD:68:AD:E6:51:DA:D2:FE:23:2B:24:3F:C9:E9:49:6D
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
authorityInfoAccess
CA Issuers - URI:http://secure.globalsign.com/cacert/gsgccr6alphasslca2025.crt OCSP - URI:http://ocsp.globalsign.com/gsgccr6alphasslca2025
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3 CPS: https://www.globalsign.com/repository/
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/gsgccr6alphasslca2025.crl
subjectAltName
DNS:*.fortetelecom.com.br, DNS:fortetelecom.com.br
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
C5:B4:93:8F:6F:2B:DC:1E:48:BF:B7:10:30:85:CE:D1:B2:BB:48:2D
subjectKeyIdentifier
A0:91:D2:48:4B:D1:C3:7F:E6:DE:BF:59:27:B3:A9:44:C4:EA:24:AE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Nov 16 23:34:41.651 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:71:D9:E2:EE:07:4A:D0:32:88:55:A8:96: 45:1E:4F:C0:8F:60:FD:65:E6:C9:00:A3:A5:C1:B0:DD: F2:17:68:A5:02:21:00:B0:9F:32:2B:90:9E:CD:A9:E7: 35:7D:E5:95:56:B2:9E:D9:C1:6B:18:92:00:C8:73:0F: 9E:CE:B5:0C:6D:C9:01 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Nov 16 23:34:41.186 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:33:8E:38:C8:B3:D3:88:0A:36:31:DF:24: 7E:76:9B:27:C7:BC:7D:1D:96:DE:7C:71:59:29:95:98: FD:8E:25:6F:02:21:00:A4:4E:7B:76:80:27:08:C7:F0: 2C:56:E2:41:A8:44:64:B8:E3:E4:F6:60:8E:BC:D3:DF: F3:62:FE:E9:E7:8B:61 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Nov 16 23:34:41.614 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:55:0B:F7:7C:90:2A:AF:8B:C6:1A:62:A0: 47:2E:12:4C:99:43:27:55:7A:1B:B7:EF:EB:3C:4D:D7: 7A:42:D5:BC:02:21:00:AB:49:8F:03:C8:9A:B8:C9:62: 97:F8:2F:C0:C8:9C:33:8F:D9:30:C6:C6:17:0D:48:31: 4B:5C:E6:82:56:EF:E6
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-07T15:46:16+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=BE O=GlobalSign nv-sa CN=AlphaSSL CA - SHA256 - G4
Issuer
C=BE O=GlobalSign nv-sa OU=Root CA CN=GlobalSign Root CA
Valid from
2022-10-12T03:49:43+00:00
Expires
2027-10-12T00:00:00+00:00
Days remaining
369
Serial (hex)
7D4D42A92B431D7E6453E7C19A8D5877
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

7C:4E:90:20:7B:2B:7C:AE:C0:80:42:6C:C4:69:90:8C:B2:7B:92:5E:E3:B1:C9:99:C2:2B:85:68:81:2F:DA:8C
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
4F:CB:AC:A8:C2:EF:AB:DD:83:6F:6B:BF:CE:98:3D:5C:58:25:76:15
authorityKeyIdentifier
60:7B:66:1A:45:0D:97:CA:89:50:2F:7D:04:CD:34:A8:FF:FC:FD:4B
authorityInfoAccess
OCSP - URI:http://ocsp.globalsign.com/rootr1 CA Issuers - URI:http://secure.globalsign.com/cacert/root-r1.crt
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/root.crl
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3
-----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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