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 cpte.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- www.cpte.de
- Valid from
- May 4, 2026
- Valid until
- Nov 18, 2026 (76 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6834446DA70EFB3CF9628AEFC647BF90
- SHA-256 fingerprint
- C1:AC:89:1C:1A:FA:81:E6:D9:85:51:DD:80:90:A6:93:C3:53:74:59:1B:C3:12:F6:C8:6C:16:42:9E:97:FE:71
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
The serving CA (Sectigo Limited) is authorized by this domain's CAA records (comodoca.com, sectigo.com, trust-provider.com, usertrust.com).
Never get surprised by cpte.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch cpte.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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