SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1-sat.com
SSL/TLS Certificate
SSL/TLS Certificate for 1-sat.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.1-sat.com
- Valid from
- Jun 19, 2026
- Valid until
- Sep 17, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0553C15D88587B629B24DA006FFC57B61C1C
- SHA-256 fingerprint
- EA:A1:84:D3:D1:9E:B9:5B:0A:83:77:53:87:AA:F1:7E:5A:5C:AF:E9:72:E3:A2:91:86:17:25:6C:95:6F:09:9B
- Chain
- YR1 → Root YR → ISRG Root X1
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 4, 2026.
Never get surprised by 1-sat.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 1-sat.com 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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