SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
itrs.net.br
SSL/TLS Certificate
SSL/TLS Certificate for itrs.net.br
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- itrs.net.br
- Valid from
- Oct 13, 2025
- Valid until
- Jan 11, 2026 (expired 193 days ago)
- Public key
- RSA 2048-bit
- Serial
- 05339553CF5A2DBA5B3CF4C3C6912D046794
- SHA-256 fingerprint
- 81:9A:89:CF:42:AE:52:5F:FD:29:9F:5E:DF:B4:0E:06:56:C0:48:3F:E0:26:65:A4:CC:22:65:39:1F:55:3F:82
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
Never get surprised by itrs.net.br's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch itrs.net.br continuously, notifying you the moment anything moves across all three signals:
Uptime
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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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