SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
frank-matthiesen.com
SSL/TLS Certificate
SSL/TLS Certificate for frank-matthiesen.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.frank-matthiesen.com
- Valid from
- Sep 30, 2026
- Valid until
- Mar 29, 2027 (176 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6B7DCBC2687369338C85BA9F4039C596
- SHA-256 fingerprint
- 10:7F:8D:DB:06:F2:F1:C0:EF:1A:79:74:B1:C5:B0:2D:DD:1E:56:9D:91:ED:63:1D:48:81:A2:AB:E0:21:A1:DD
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by frank-matthiesen.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch frank-matthiesen.com 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.