SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sit-down.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for sit-down.co.uk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sit-down.co.uk
- Valid from
- Jun 9, 2026
- Valid until
- Sep 7, 2026 (31 days remaining)
- Public key
- EC 256-bit
- Serial
- 0612A254EFE8DCDE0BDA8204C941F76A80B2
- SHA-256 fingerprint
- 04:C6:E4:24:C8:88:27:CD:CF:F2:BA:09:A8:14:FC:CF:61:8E:63:51:B9:4F:B1:08:5A:63:17:4A:00:57:E5:DC
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sit-down.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sit-down.co.uk 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.
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