SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
telesec.com
SSL/TLS Certificate
SSL/TLS Certificate for telesec.com
Valid- Issued by (CA)
- Deutsche Telekom Security GmbH
- Subject
- www.telesec.de
- Valid from
- Feb 11, 2026
- Valid until
- Feb 15, 2027 (194 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 2552728F5410C5BE0F8A065FEC3C4DE9
- SHA-256 fingerprint
- 82:AE:B3:A6:05:77:51:B1:4B:45:31:B4:72:DC:93:4A:C9:BB:5C:4B:5D:C6:3F:4B:79:80:F9:DC:19:4E:BD:40
- Chain
- Telekom Security ServerID OV Class 2 CA → T-TeleSec GlobalRoot Class 2
Certificate Authority Authorization (CAA)
CAA restricts issuance to telesec.de; we couldn't map the serving CA (Deutsche Telekom Security GmbH) to one of these identifiers.
This certificate has been served since Jul 31, 2026.
Never get surprised by telesec.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch telesec.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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