SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1-secure.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for 1-secure.co.uk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 1-secure.co.uk
- Valid from
- Sep 14, 2026
- Valid until
- Dec 13, 2026 (41 days remaining)
- Public key
- EC 256-bit
- Serial
- 05A516D896C4B10B5FE000AC6FCDCB9C212C
- SHA-256 fingerprint
- 09:A9:0A:31:F9:AA:39:C3:37:D4:CE:CA:04:0F:FC:1B:47:6F:4E:66:04:64:FD:FA:45:CA:AB:62:D4:35:32:F6
- 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.
This certificate has been served since Oct 19, 2026.
Never get surprised by 1-secure.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 1-secure.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, 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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