SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
o-sat.net
SSL/TLS Certificate
SSL/TLS Certificate for o-sat.net
Valid- Issued by (CA)
- Nijimo, Inc.
- Subject
- o-sat.net
- Valid from
- Feb 27, 2026
- Valid until
- Mar 29, 2027 (183 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 8EE1A9B6076D821A5EC20955FAE3A483
- SHA-256 fingerprint
- 15:E1:60:C7:9A:B4:02:A4:FF:9D:32:7E:7F:12:DD:D3:FC:39:D8:BE:91:A5:34:96:E1:6F:CC:9A:E6:19:02:CD
- Chain
- FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by o-sat.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch o-sat.net 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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