SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
threema.group
SSL/TLS Certificate
SSL/TLS Certificate for threema.group
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- threema.group
- Valid from
- Apr 17, 2026
- Valid until
- Nov 1, 2026 (46 days remaining)
- Public key
- EC 256-bit
- Serial
- 86ACFB4E2D2B598A1B4F512B7BBF0A2E
- SHA-256 fingerprint
- D0:41:E0:92:D4:F6:FC:05:70:89:60:CC:E2:7E:F2:3F:19:C6:35:2C:91:DE:56:96:B6:37:A6:19:80:28:79:91
- Chain
- Sectigo Public Server Authentication CA DV E36 → Sectigo Public Server Authentication Root E46 → USERTrust ECC Certification Authority
Certificate Authority Authorization (CAA)
The serving CA (Sectigo Limited) is authorized by this domain's CAA records (comodoca.com, sectigo.com, trust-provider.com).
Never get surprised by threema.group's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch threema.group 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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