SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gt-reader.com
SSL/TLS Certificate
SSL/TLS Certificate for gt-reader.com
Valid- Issued by (CA)
- Amazon
- Subject
- gt-reader.com
- Valid from
- Jan 27, 2026
- Valid until
- Feb 25, 2027 (133 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0B225EA449DE962978F5C49162D8669D
- SHA-256 fingerprint
- CB:E4:AF:EA:15:76:F6:3D:8F:9A:E8:82:60:F9:A5:F5:1D:6B:A2:BA:C4:2F:55:79:00:5D:74:78:EB:27:B2:16
- Chain
- Amazon RSA 2048 M01 → 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 (amazontrust.com).
This certificate has been served since Aug 7, 2026.
Never get surprised by gt-reader.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch gt-reader.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, 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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