SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-57-181-14-148.ap-northeast-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-57-181-14-148.ap-northeast-1.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- *.mejiro.ac.jp
- Valid from
- May 6, 2026
- Valid until
- Nov 19, 2026 (97 days remaining)
- Public key
- EC 256-bit
- Serial
- 06218828339610AF14EFC4BA451A5E3B
- SHA-256 fingerprint
- EC:DF:27:BB:E7:9B:9D:04:F8:26:62:E5:C3:62:F7:7F:D8:0D:DC:7C:B2:75:C9:28:28:C4:C0:A6:07:83:1B:55
- Chain
- Amazon ECDSA 256 M01 → Amazon Root CA 3 → Starfield Services 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 ec2-57-181-14-148.ap-northeast-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-57-181-14-148.ap-northeast-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.