SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nb-readings.com
SSL/TLS Certificate
SSL/TLS Certificate for nb-readings.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- tls.automattic.com
- Valid from
- Aug 14, 2026
- Valid until
- Nov 12, 2026 (86 days remaining)
- Public key
- EC 256-bit
- Serial
- FCA70A8975AABFFF133E232F3832AB4E
- SHA-256 fingerprint
- C6:B6:5B:33:24:BD:D4:41:2A:34:36:68:A2:C9:50:A5:6B:91:E6:E5:D3:54:2F:11:4B:0C:0F:63:19:42:AC:BF
- Chain
- WR1 → GTS Root R1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Aug 9, 2026.
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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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