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 infrastructcivil-h2o.net

Valid
Issued by (CA)
ZeroSSL GmbH
Subject
infrastructcivil-h2o.net
Valid from
Sep 20, 2026
Valid until
Dec 19, 2026 (39 days remaining)
Public key
EC 384-bit
Serial
EFA45EF5A7A0B615CBFA787F8F8E05BA
SHA-256 fingerprint
9D:41:77:A1:B3:11:23:D5:B4:65:F0:9B:23:07:2F:47:ED:3E:17:83:D7:F6:E7:7E:B8:F1:68:DF:41:7E:A1:AF
Chain
ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC Certification Authority
Subject Alternative Names (1)
infrastructcivil-h2o.net

Certificate Authority Authorization (CAA)

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

Never get surprised by infrastructcivil-h2o.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch infrastructcivil-h2o.net 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.