SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
erik-tesar.com
SSL/TLS Certificate
SSL/TLS Certificate for erik-tesar.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- erik-tesar.com
- Valid from
- Sep 18, 2026
- Valid until
- Dec 17, 2026 (86 days remaining)
- Public key
- EC 256-bit
- Serial
- 0540D13A9D449B6344971F2FA62BD01AE7DD
- SHA-256 fingerprint
- 98:55:66:94:E3:19:78:FF:F1:6C:0E:56:0F:D1:73:E0:8B:1F:69:ED:94:E9:00:71:75:7A:9F:55:25:47:7D:80
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com).
Never get surprised by erik-tesar.com's certificate expiring
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Uptime
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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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