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

TLSv1.2

smtp.telexfibra.com.br · 191.37.168.3:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `smtp.telexfibra.com.br'
The certificate expires within 30 days.

Certificate verification failed

Subject
CN=message.teracomunicacoes.com.br
Issuer
C=US O=Let's Encrypt CN=YE1
Valid from
2026-08-17T11:29:31+00:00
Expires
2026-11-15T11:29:30+00:00
Days remaining
25
Serial (hex)
05DD86228B1EC04AC15C78CC3D478D0A24BE
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:mail.hiperfibra.com.br, DNS:mail.spnettelecom.com.br, DNS:mail.telexfibra.com.br, DNS:mail.terabuild.com.br, DNS:mail.teracomunicacoes.com.br, DNS:mail.terahome.com.br, DNS:mail.vennerindustria.com.br, DNS:message.teracomunicacoes.com.br, DNS:webmail.hiperfibra.com.br, DNS:webmail.spnettelecom.com.br, DNS:webmail.telexfibra.com.br, DNS:webmail.terabuild.com.br, DNS:webmail.teracomunicacoes.com.br, DNS:webmail.terahome.com.br, DNS:webmail.vennerindustria.com.br

SHA-256 fingerprint

C9:86:24:83:D6:3E:C5:9A:37:90:B5:AE:53:15:C8:E4:5B:DA:56:E5:C3:D7:3D:29:27:E2:64:8F:40:1F:FE:BC
Certificate extensions & PEM
keyUsage
Digital Signature
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
C8:BF:CB:91:58:5A:C5:E4:8F:BC:F3:28:5F:C3:97:F2:E4:DF:AC:1E
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:mail.hiperfibra.com.br, DNS:mail.spnettelecom.com.br, DNS:mail.telexfibra.com.br, DNS:mail.terabuild.com.br, DNS:mail.teracomunicacoes.com.br, DNS:mail.terahome.com.br, DNS:mail.vennerindustria.com.br, DNS:message.teracomunicacoes.com.br, DNS:webmail.hiperfibra.com.br, DNS:webmail.spnettelecom.com.br, DNS:webmail.telexfibra.com.br, DNS:webmail.terabuild.com.br, DNS:webmail.teracomunicacoes.com.br, DNS:webmail.terahome.com.br, DNS:webmail.vennerindustria.com.br
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://ye1.c.lencr.org/63.crl
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 : Aug 17 12:28:01.427 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:D4:F1:C0:A7:36:AE:5C:C3:F3:7D:FD: 7A:89:3B:37:8E:3A:C0:2B:6D:B0:55:AF:9F:B1:F7:6C: 72:1F:06:59:49:02:20:6B:4A:B0:14:58:65:EA:8B:A3: 01:96:09:26:8C:BC:B1:01:32:8F:8D:23:2D:B5:DB:B6: 2C:67:77:2D:F4:06:31 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Aug 17 12:28:02.029 2026 GMT Extensions: 00:00:05:00:1D:AB:71:8B Signature : ecdsa-with-SHA256 30:45:02:21:00:DD:38:12:C2:32:AF:9F:1A:FE:70:7F: 5E:42:3B:76:4F:66:00:C5:3F:F0:16:0A:FF:08:5C:E8: 11:F6:55:DE:43:02:20:59:25:89:F6:FD:84:42:4D:85: C6:9B:CC:07:A3:24:C1:F4:B8:78:D5:71:19:5F:FD:56: FF:7E:95:D6:28:52:3A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-ECDSA-AES128-GCM-SHA256 · Checked 2026-10-21T06:47:40+00:00

Server-presented chain · 3 additional certificates

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
682
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-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YE
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X2
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2143
Serial (hex)
872165FC34B6E5FBA8ADD5B3705FB53A
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

0F:C0:90:1C:CA:2B:AE:9E:9F:DB:B0:2D:50:D0:2F:10:94:F7:B3:66:72:08:69:91:B9:E8:97:62:6D:C4:85:F0
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
A3:C8:26:5A:8E:A1:4C:D0:35:63:FC:9B:23:C8:3A:AE:56:F3:4F:56
authorityKeyIdentifier
7C:42:96:AE:DE:4B:48:3B:FA:92:F8:9E:8C:CF:6D:8B:A9:72:37:95
authorityInfoAccess
CA Issuers - URI:http://x2.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x2.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 3

Subject
C=US O=Internet Security Research Group CN=ISRG Root X2
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X2
Valid from
2020-09-04T00:00:00+00:00
Expires
2040-09-17T16:00:00+00:00
Days remaining
5080
Serial (hex)
41D29DD172EAEEA780C12C6CE92F8752
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

69:72:9B:8E:15:A8:6E:FC:17:7A:57:AF:B7:17:1D:FC:64:AD:D2:8C:2F:CA:8C:F1:50:7E:34:45:3C:CB:14:70
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
subjectKeyIdentifier
7C:42:96:AE:DE:4B:48:3B:FA:92:F8:9E:8C:CF:6D:8B:A9:72:37:95
-----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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