SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ajoliveira.com
SSL/TLS Certificate
SSL/TLS Certificate for ajoliveira.com
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- ajoliveira.com
- Valid from
- Aug 2, 2026
- Valid until
- Oct 31, 2026 (49 days remaining)
- Public key
- EC 256-bit
- Serial
- 5D885B3328FF3E7D4AF16B2B2675F44A
- SHA-256 fingerprint
- 33:68:9B:5A:74:18:EF:5A:81:FA:D1:82:AF:4D:35:EE:29:1E:3A:E6:96:F3:E9:29:C8:C1:4C:2B:D4:25:5E:F2
- Chain
- ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC Certification Authority
Certificate Authority Authorization (CAA)
This certificate has been served since Jul 27, 2026.
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Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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