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

mail.start-it.com.br · 191.8.183.73:443

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
C=US CN=Cloudflare
Issuer
C=US ST=California L=San Francisco O=Cloudflare, Inc. OU=www.cloudflare.com CN=Managed CA 7e5bfd4594ec5a984c5848efa94accab
Valid from
2025-04-03T16:11:00+00:00
Expires
2040-03-30T16:11:00+00:00
Days remaining
4930
Serial (hex)
39FD09EB577A11A11EB6CDF1DBF2CDAA7B2A2954
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

84:D5:22:6B:45:1F:0A:E5:81:E4:11:23:F7:94:B1:84:CE:06:22:DB:D9:B2:B2:5B:06:8A:46:89:E8:BB:10:A5
Certificate extensions & PEM
extendedKeyUsage
TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
64:64:30:22:AE:7E:51:5C:12:C8:A6:5A:BF:99:6B:20:AA:82:5A:1E
authorityKeyIdentifier
16:2C:9E:28:83:97:73:F2:82:E9:6A:17:DA:60:0D:76:84:61:96:D6
crlDistributionPoints
Full Name: URI:http://crl.cloudflare.com/ea723d7e-c869-479a-8d5e-e5e9b8f35d3a.crl 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-30T04:20:47+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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