SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
h-squared.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for h-squared.co.uk
Valid- Issued by (CA)
- Starfield Technologies
- Subject
- h-squared.co.uk
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (52 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 616F45916CF8112F
- SHA-256 fingerprint
- 5F:17:31:05:45:50:E8:C1:26:4E:C9:47:3B:D2:0B:9A:56:2A:75:19:F8:04:99:A1:8B:BE:2C:8C:68:F8:AC:11
- Chain
- Starfield TLS Intermediate CA DV - R1v1 → Starfield TLS Root CA - R1 → Starfield Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by h-squared.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch h-squared.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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