SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
j-class.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for j-class.co.uk
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.j-class.co.uk
- Valid from
- Sep 5, 2026
- Valid until
- Mar 23, 2027 (196 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 65A7C7D32AC67B7110D55E6325A97979
- SHA-256 fingerprint
- 13:F0:57:DA:8A:8E:86:91:AE:E8:93:8A:08:F8:96:8E:5F:C3:56:F2:6B:D0:F3:0B:1E:FB:B6:B7:34:F4:6B:74
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by j-class.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch j-class.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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