SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
x-direct-microsoft.com
SSL/TLS Certificate
SSL/TLS Certificate for x-direct-microsoft.com
Hostname mismatch- Issued by (CA)
- Microsoft Corporation
- Subject
- reroute443.microsoft.com
- Valid from
- Aug 26, 2026
- Valid until
- Dec 4, 2026 (92 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4100C587FBEA164B5EFA1DE8CD000000C587FB
- SHA-256 fingerprint
- 3B:43:E4:51:BB:4C:5E:1E:63:70:FB:BB:A6:06:6D:F4:20:1C:20:0B:02:AE:39:33:9A:67:AE:3D:C0:76:F3:91
- Chain
- Microsoft TLS G2 RSA CA OCSP 02 → Microsoft TLS RSA Root G2 → DigiCert Global Root G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by x-direct-microsoft.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch x-direct-microsoft.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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