SSL/TLS Certificate Lookup

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

SSL/TLS Certificate for gerhard-maresch.art

Valid
Issued by (CA)
Let's Encrypt
Subject
gerhard-maresch.art
Valid from
Aug 13, 2026
Valid until
Nov 11, 2026 (68 days remaining)
Public key
RSA 2048-bit
Serial
0525FC06B45B934F6F7D161004931679E933
SHA-256 fingerprint
81:16:A8:77:74:5A:D8:C6:F0:96:29:AC:2E:78:41:54:27:67:9A:7F:DD:0F:1F:8B:7E:27:E4:F9:75:1A:5F:6E
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
gerhard-maresch.art, www.gerhard-maresch.art

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 Jul 25, 2026.

Never get surprised by gerhard-maresch.art's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch gerhard-maresch.art 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.