SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
3-seconds.com
SSL/TLS Certificate
SSL/TLS Certificate for 3-seconds.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 3-seconds.com
- Valid from
- Jul 25, 2026
- Valid until
- Oct 23, 2026 (49 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06EF3C0222D1A4677DF07F69D69D18839EAF
- SHA-256 fingerprint
- 8E:08:0C:AC:DD:C1:83:0B:AA:D4:B6:90:0F:DE:1B:D7:63:68:4A:39:84:A3:9A:59:22:98:FC:08:4F:BE:71:19
- 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 12, 2026.
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This is today's certificate. Turn on monitoring and we'll watch 3-seconds.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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