SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
foldr-app.com
SSL/TLS Certificate
SSL/TLS Certificate for foldr-app.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.foldr-app.com
- Valid from
- Oct 2, 2026
- Valid until
- Dec 31, 2026 (51 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05594EB128EBA3C2EAB9AD98C8B6FBA1595E
- SHA-256 fingerprint
- 76:6B:38:40:F9:14:B5:5D:F1:73:F5:39:42:29:55:A7:37:DB:AA:F3:E2:03:D9:99:7D:F2:89:14:AE:08:9A:69
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org, pki.goog, sectigo.com).
We've observed 1 previous certificate for this host. This certificate has been served since Aug 10, 2026.
Never get surprised by foldr-app.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch foldr-app.com continuously, notifying you the moment anything moves across all three signals:
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, CNAME, TXT 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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