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 architekt-fehrs.com

Valid
Issued by (CA)
Let's Encrypt
Subject
www.architekt-fehrs.com
Valid from
Oct 22, 2026
Valid until
Jan 20, 2027 (73 days remaining)
Public key
RSA 4096-bit
Serial
060AE801E000563A418D9D3A2AB940AB1B69
SHA-256 fingerprint
14:03:5C:DB:90:6B:EE:51:70:21:80:27:51:9C:CD:EE:12:C3:DB:A7:1D:82:E2:E6:BA:62:B3:B7:59:F4:EE:13
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
architekt-fehrs.com, www.architekt-fehrs.com

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 Oct 9, 2026.

Never get surprised by architekt-fehrs.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch architekt-fehrs.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.