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 nxt.casa
Self-signed- Issued by (CA)
- nxt.casa
- Subject
- nxt.casa
- Valid from
- Jan 23, 2021
- Valid until
- Jan 23, 2022 (expired 1689 days ago)
- Public key
- RSA 2048-bit
- Serial
- 01E308D5C3
- SHA-256 fingerprint
- 7C:02:87:88:A7:64:E5:21:BA:B6:14:04:C2:F0:3A:2B:E7:CF:F1:4D:FE:9F:FA:91:9E:8A:90:AC:EA:D2:EB:73
- Chain
- nxt.casa
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch nxt.casa 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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