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 bn-web.com

Untrusted chain
Issued by (CA)
DigiCert Inc
Subject
*.nook.com
Valid from
Jan 28, 2026
Valid until
Feb 16, 2027 (101 days remaining)
Public key
RSA 2048-bit
Serial
079EA47DF736C8FCE440D26FF0E13A12
SHA-256 fingerprint
E1:19:2E:25:4C:AF:8B:63:DB:54:97:32:FF:F3:F4:B9:5A:CF:EA:89:7D:80:BE:A8:6E:0B:74:99:8C:44:A8:A1
Chain
—
Subject Alternative Names (2)
*.nook.com, nook.com

Certificate Authority Authorization (CAA)

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

We've observed 2 previous certificates for this host. This certificate has been served since Nov 6, 2026.

Never get surprised by bn-web.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch bn-web.com continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.