SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sap-calculations.co.uk
SSL/TLS Certificate
SSL/TLS Certificate for sap-calculations.co.uk
Self-signed- Issued by (CA)
- sap-calculations.co.uk
- Subject
- sap-calculations.co.uk
- Valid from
- Dec 2, 2020
- Valid until
- Dec 2, 2021 (expired 1744 days ago)
- Public key
- RSA 2048-bit
- Serial
- 0208F9C6E4
- SHA-256 fingerprint
- 56:C6:4A:D6:91:FD:DA:84:D9:D8:7D:04:C4:2D:88:82:85:7F:3B:43:1B:5A:E8:99:0B:9D:8E:CD:D6:9F:12:05
- Chain
- sap-calculations.co.uk
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 20, 2026.
Never get surprised by sap-calculations.co.uk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sap-calculations.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.