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 sg-mm.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.sg-mm.de
- Valid from
- Jun 26, 2026
- Valid until
- Jan 10, 2027 (155 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4F47689353ED0B3A1A2C8B407936C702
- SHA-256 fingerprint
- C8:8F:DD:12:05:4C:90:31:5F:E3:7D:8F:F6:7E:63:42:7D:1A:B5:48:72:F7:28:3B:90:95:D3:B5:23:C5:4A:6C
- 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 sg-mm.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sg-mm.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.
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