SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
myteacherbooks.com
SSL/TLS Certificate
SSL/TLS Certificate for myteacherbooks.com
Valid- Issued by (CA)
- Amazon
- Subject
- myteacherbooks.com
- Valid from
- Nov 8, 2026
- Valid until
- May 25, 2027 (194 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 41030D2E7B3F8264A346EDC24A448E0A
- SHA-256 fingerprint
- E7:B9:9F:C0:2B:9F:48:B8:2E:D3:89:3C:51:41:B1:CC:E1:C4:0E:AA:CB:9F:65:20:4B:66:18:E4:1F:DF:B2:44
- Chain
- Amazon RSA 2048 S20 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
The serving CA (Amazon) is authorized by this domain's CAA records (amazon.com, amazonaws.com, amazontrust.com, awstrust.com).
This certificate has been served since Nov 8, 2026.
Never get surprised by myteacherbooks.com's certificate expiring
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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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