SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for 1-800-microsoft.com

Hostname mismatch
Issued by (CA)
Microsoft Corporation
Subject
reroute443.microsoft.com
Valid from
Jul 14, 2026
Valid until
Oct 22, 2026 (92 days remaining)
Public key
RSA 2048-bit
Serial
55007A51B213BC95303BA64E440000007A51B2
SHA-256 fingerprint
A1:AA:1A:1B:39:3D:4E:8F:AF:2C:5A:F3:73:F8:6F:F3:84:3A:06:E7:0A:1A:E1:6A:4B:E9:93:77:91:A1:D5:3B
Chain
Microsoft TLS G2 RSA CA OCSP 16 → Microsoft TLS RSA Root G2 → DigiCert Global Root G2
Subject Alternative Names (1)
reroute443.microsoft.com

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.