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 merkscha.com

Valid
Issued by (CA)
Let's Encrypt
Subject
bizcard.merkscha.com
Valid from
Aug 4, 2026
Valid until
Nov 2, 2026 (79 days remaining)
Public key
EC 384-bit
Serial
051277F5865AAB5BD157B5C5DA5DE37268C4
SHA-256 fingerprint
C2:E0:A5:11:FF:21:5D:1D:DF:E8:DF:CD:3D:E2:3B:66:99:B8:02:0A:54:68:CA:9C:68:3F:70:06:EB:AE:4C:0F
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (4)
bizcard.merkscha.com, mail.merkscha.com, merkscha.com, www.merkscha.com

Certificate Authority Authorization (CAA)

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

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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.

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