SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
threema.com
SSL/TLS Certificate
SSL/TLS Certificate for threema.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.threema.com
- Valid from
- Jun 29, 2026
- Valid until
- Jan 13, 2027 (119 days remaining)
- Public key
- EC 256-bit
- Serial
- C205E20D6BB949C5EA51C7E242B9F825
- SHA-256 fingerprint
- 80:FE:CE:9E:3E:EC:6F:84:3A:20:1A:06:EE:54:5E:62:78:97:01:5A:9D:98:99:B4:E2:8C:D6:09:5F:ED:02:D3
- Chain
- Sectigo Public Server Authentication CA OV 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.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch threema.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.
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