SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
t-mobile.at
SSL/TLS Certificate
SSL/TLS Certificate for t-mobile.at
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- magenta.at
- Valid from
- Jul 31, 2025
- Valid until
- Aug 30, 2026 (39 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 28BFD5AAED7A479FB96FC79EED8D2F3C
- SHA-256 fingerprint
- 1B:14:0F:33:01:5C:02:5B:B5:1C:44:27:5E:BD:4F:AD:8F:F4:ED:16:53:04:92:32:53:79:2F:25:2F:A9:FF:1A
- 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 t-mobile.at's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch t-mobile.at 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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