SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
www-tk1971.com
SSL/TLS Certificate
SSL/TLS Certificate for www-tk1971.com
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- *.www-tk1971.com
- Valid from
- Jul 4, 2026
- Valid until
- Oct 2, 2026 (29 days remaining)
- Public key
- RSA 2048-bit
- Serial
- FDEB236AE15679672397A2CC1A394C97
- SHA-256 fingerprint
- C9:05:C9:DA:DD:34:C8:C5:A7:17:EF:2E:B7:5B:15:3B:A6:DD:DE:B3:DD:39:81:10:41:47:13:3A:9B:E5:F1:74
- Chain
- ZeroSSL RSA DV SSL CA 2 → Sectigo Public Server Authentication Root R46
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 26, 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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