SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
catolica-lisbon.org
SSL/TLS Certificate
SSL/TLS Certificate for catolica-lisbon.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.catolica-lisbon.org
- Valid from
- May 26, 2026
- Valid until
- Aug 24, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05217D9AC9005E1B335A328EE4360DAD7263
- SHA-256 fingerprint
- 79:3B:CA:38:02:F2:17:36:07:1C:EA:0E:EC:AD:F6:45:B5:06:4A:CB:2C:19:75:95:B7:4C:DB:BE:E9:40:0C:A7
- Chain
- R13 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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