SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-16-16-121-179.eu-north-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-16-16-121-179.eu-north-1.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- lockhernapps.com
- Valid from
- Jun 6, 2026
- Valid until
- Sep 4, 2026 (43 days remaining)
- Public key
- EC 256-bit
- Serial
- 066E2C5EDA4D33FC1FE8ECA6EF5D7DE0EB23
- SHA-256 fingerprint
- FB:F7:46:BD:AC:B2:8B:E0:89:82:A1:67:19:DA:87:E8:E2:6B:0E:02:5E:55:51:30:74:C7:D8:70:C5:74:C3:83
- Chain
- YE2 → 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.
Never get surprised by ec2-16-16-121-179.eu-north-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-16-16-121-179.eu-north-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.