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 mh-mailbox.de

Valid
Issued by (CA)
Sectigo Limited
Subject
www.mh-mailbox.de
Valid from
Mar 12, 2026
Valid until
Mar 12, 2027 (144 days remaining)
Public key
RSA 2048-bit
Serial
1A5DF88358718735F80CC585CDBF14EE
SHA-256 fingerprint
BB:79:0A:C4:B6:E3:D8:18:33:6B:79:E9:E2:D9:71:34:45:81:25:C6:2D:4E:49:29:E3:21:4E:DD:87:77:DC:5A
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Subject Alternative Names (5)
autodiscover.mh-mailbox.de, mh-mailbox.de, mhmailbox.de, www.mh-mailbox.de, www.mhmailbox.de

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 mh-mailbox.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch mh-mailbox.de 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.