SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
teknadoc-alexa01.com
SSL/TLS Certificate
SSL/TLS Certificate for teknadoc-alexa01.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- teknadoc-alexa01.com
- Valid from
- Jul 17, 2026
- Valid until
- Oct 15, 2026 (67 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05FC3988B7C7D8D0E8B911E5D353C155518D
- SHA-256 fingerprint
- AD:94:41:A8:46:E8:EC:45:B7:3F:7B:71:14:A2:55:60:AA:7B:C3:AC:80:83:88:B3:E7:AE:B1:DB:EE:C3:D1:BA
- 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 Aug 1, 2026.
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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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