SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sterna-app.com
SSL/TLS Certificate
SSL/TLS Certificate for sterna-app.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- api.sterna-app.com
- Valid from
- Sep 13, 2026
- Valid until
- Dec 12, 2026 (40 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 061A91BACC84FC26312EE84F4F744DB0C32D
- SHA-256 fingerprint
- D6:01:76:3E:ED:F0:AA:D0:88:94:EE:1E:4A:3E:CC:19:A7:B7:2A:44:84:B7:3C:EE:8B:90:ED:09:C0:A2:10:07
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Oct 26, 2026.
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This is today's certificate. Turn on monitoring and we'll watch sterna-app.com continuously, notifying you the moment anything moves across all three signals:
Uptime
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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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