SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
physio-theory.com
SSL/TLS Certificate
SSL/TLS Certificate for physio-theory.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- physio-theory.com
- Valid from
- Aug 3, 2026
- Valid until
- Nov 1, 2026 (54 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 058BE7AE53B9888E9DE9531767AB47803E3B
- SHA-256 fingerprint
- 30:58:63:98:66:D8:C7:D0:2D:88:44:B3:A9:5E:D4:13:0B:A1:A5:95:3F:66:84:2D:DA:BC:04:96:5A:F5:64:BC
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Aug 31, 2026.
Never get surprised by physio-theory.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch physio-theory.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.