SSL/TLS Certificate Lookup

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

ec2-3-148-153-128.us-east-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-3-148-153-128.us-east-2.compute.amazonaws.com

Expired
Issued by (CA)
Let's Encrypt
Subject
briggs.dev
Valid from
Jul 26, 2025
Valid until
Oct 24, 2025 (expired 279 days ago)
Public key
RSA 2048-bit
Serial
0529EC6238AF154613FB145E57629F2E51A0
SHA-256 fingerprint
4D:B4:39:06:C3:EA:E3:59:91:9A:3B:E4:E3:AF:E1:A8:58:BB:49:16:0C:ED:5C:16:93:57:0B:F4:0A:37:3E:90
Chain
R11 → ISRG Root X1
Subject Alternative Names (6)
afd.api.hyperproto.app, afd.hyperproto.app, briggs.dev, grotonfiredept.com, www.briggs.dev, www.grotonfiredept.com

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by ec2-3-148-153-128.us-east-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-3-148-153-128.us-east-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, 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.

Monitor this certificate free

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