SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-13-124-231-89.ap-northeast-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-13-124-231-89.ap-northeast-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.fontbada.co.kr
- Valid from
- Sep 22, 2026
- Valid until
- Dec 21, 2026 (38 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 055FC85E25BCE20CF6BC20546573299876DA
- SHA-256 fingerprint
- 4F:CB:50:E8:86:3D:A9:0F:76:D5:1A:16:16:92:87:B7:5B:0D:28:1E:AC:CD:B1:85:63:96:B1:F3:26:E9:3A:B2
- Chain
- YR2 → Root YR → 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 ec2-13-124-231-89.ap-northeast-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-13-124-231-89.ap-northeast-2.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, CNAME, TXT 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.