SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dear-self.app
SSL/TLS Certificate
SSL/TLS Certificate for dear-self.app
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dear-self.app
- Valid from
- Sep 15, 2026
- Valid until
- Dec 14, 2026 (77 days remaining)
- Public key
- EC 256-bit
- Serial
- 057227B0A7E281300FF7B3F0CBD043A1A609
- SHA-256 fingerprint
- 34:16:F3:F1:49:34:0F:9F:6F:AF:60:B5:70:7C:50:07:A0:48:8D:EC:67:12:4C:FC:95:AE:F0:64:33:BB:48:24
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by dear-self.app's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dear-self.app 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, 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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