SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
takanashi-clinic.com
SSL/TLS Certificate
SSL/TLS Certificate for takanashi-clinic.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.takanashi-clinic.com
- Valid from
- Jun 19, 2026
- Valid until
- Sep 17, 2026 (31 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05831F007B36DCAD3930BCF83CE16EE70E6E
- SHA-256 fingerprint
- 8F:9B:18:44:D1:1C:48:66:7E:05:B0:7B:8F:51:0A:CD:5A:2F:3E:D8:95:88:29:0B:75:71:15:B4:EE:D3:9D:ED
- 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.
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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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