SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bar-yam.org
SSL/TLS Certificate
SSL/TLS Certificate for bar-yam.org
Self-signed- Issued by (CA)
- bar-yam.interjournal.org
- Subject
- bar-yam.interjournal.org
- Valid from
- May 21, 2019
- Valid until
- May 20, 2020 (expired 2318 days ago)
- Public key
- RSA 2048-bit
- Serial
- B6056F85
- SHA-256 fingerprint
- C4:5D:51:DD:F0:06:74:0C:7E:D2:76:8A:57:0C:F7:4F:AB:51:A6:12:6A:98:BC:4E:67:A3:1A:E5:29:F5:D0:98
- Chain
- bar-yam.interjournal.org
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 Sep 21, 2026.
Never get surprised by bar-yam.org's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bar-yam.org 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.