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 m-sig.de
Expiring soon- Issued by (CA)
- Sectigo Limited
- Subject
- m-sig.de
- Valid from
- Oct 13, 2025
- Valid until
- Nov 3, 2026 (20 days remaining)
- Public key
- RSA 2048-bit
- Serial
- AE35F5320CDB8E00BE3824DC38FC4378
- SHA-256 fingerprint
- 0C:9E:60:02:10:AB:2F:62:98:06:29:5A:E2:8F:14:7C:B7:02:CE:F4:8C:DE:02:B4:6C:F4:6A:4F:B6:49:B3:72
- 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.
This certificate has been served since Oct 4, 2026.
Never get surprised by m-sig.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch m-sig.de 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.