SSL/TLS Certificate Lookup

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

amp.dev

SSL/TLS Certificate

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SSL/TLS Certificate for amp.dev

Valid
Issued by (CA)
Let's Encrypt
Subject
amp.dev
Valid from
Jun 28, 2026
Valid until
Sep 26, 2026 (65 days remaining)
Public key
EC 256-bit
Serial
05038A4358E86E129B3779A4D636E99F9D4A
SHA-256 fingerprint
EC:32:04:84:EA:6A:7B:B0:06:42:3A:C3:EA:F0:28:B7:DB:25:EB:2F:A2:5D:DC:53:C9:1E:1D:82:B5:C9:1C:6D
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (3)
amp.dev, go.amp.dev, www.amp.dev

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (digicert.com, letsencrypt.org, pki.goog).