SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
desymm.uk
SSL/TLS Certificate
SSL/TLS Certificate for desymm.uk
Valid- Issued by (CA)
- Google Trust Services
- Subject
- desymm.uk
- Valid from
- Nov 12, 2026
- Valid until
- Feb 10, 2027 (87 days remaining)
- Public key
- EC 256-bit
- Serial
- 532288CD6F50A51D0E3436B42E61D080
- SHA-256 fingerprint
- 59:F1:C0:83:89:03:19:88:6B:C8:95:FA:72:07:72:E0:C8:6E:B6:76:D1:22:22:D8:50:D1:9A:07:EB:C0:EF:CA
- Chain
- WE1 → GTS Root R4
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 Jul 25, 2026.
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This is today's certificate. Turn on monitoring and we'll watch desymm.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, CNAME, TXT 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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