SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
assertion-check.com
SSL/TLS Certificate
SSL/TLS Certificate for assertion-check.com
Valid- Issued by (CA)
- Amazon
- Subject
- *.assertion-check.com
- Valid from
- Oct 25, 2026
- Valid until
- May 11, 2027 (182 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 43CBE944910F4FCBCD90C8A21A6D7D02
- SHA-256 fingerprint
- E9:7F:14:53:BF:64:E7:C8:48:A7:35:61:5A:21:89:2A:6B:83:A9:27:71:83:0A:FC:21:64:42:57:D9:70:B6:63
- Chain
- Amazon RSA 2048 S24 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
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 27, 2026.
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This is today's certificate. Turn on monitoring and we'll watch assertion-check.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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