SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-18-21-45.eu-west-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-18-21-45.eu-west-1.compute.amazonaws.com
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- *.acreat.net
- Valid from
- Sep 17, 2021
- Valid until
- Dec 16, 2021 (expired 1685 days ago)
- Public key
- RSA 2048-bit
- Serial
- 03461C32EC03C7A4D6DC46DE84A8315E154C
- SHA-256 fingerprint
- 26:89:CF:2D:77:92:E8:97:AA:E3:C7:63:63:A0:AD:64:C6:F2:45:26:E7:87:E6:4F:2E:1A:B2:4B:97:CD:0F:9C
- Chain
- R3 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-52-18-21-45.eu-west-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-18-21-45.eu-west-1.compute.amazonaws.com 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.