SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
app-uk.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for app-uk.co.uk
Hostname mismatch- Issued by (CA)
- Sectigo Limited
- Subject
- www.app-uk.co.uk
- Valid from
- Jul 2, 2026
- Valid until
- Jan 16, 2027 (124 days remaining)
- Public key
- RSA 2048-bit
- Serial
- CB16C154657F183F8A5743F4C7E61064
- SHA-256 fingerprint
- 8C:66:63:9B:EA:1F:59:FD:C5:8F:98:D3:66:67:E0:53:FB:FC:C5:ED:CA:60:0D:AA:1B:1C:A7:F3:2C:35:31:63
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
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 10, 2026.
Never get surprised by app-uk.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch app-uk.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.