SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

ec2-3-129-26-201.us-east-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-3-129-26-201.us-east-2.compute.amazonaws.com

Self-signed
Issued by (CA)
ip-172-26-1-76
Subject
ip-172-26-1-76
Valid from
Apr 21, 2026
Valid until
Apr 18, 2036 (3447 days remaining)
Public key
RSA 2048-bit
Serial
2D266D2F804D4DE5865735B881F318003C388485
SHA-256 fingerprint
0E:D3:2E:F8:9B:44:7F:FE:93:C6:90:F8:4D:A4:03:E3:23:E8:7D:5C:32:CB:94:BF:81:8E:6A:77:D4:FD:4A:6B
Chain
ip-172-26-1-76
Subject Alternative Names (1)
ip-172-26-1-76

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 Sep 5, 2026.

Never get surprised by ec2-3-129-26-201.us-east-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-3-129-26-201.us-east-2.compute.amazonaws.com continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.