SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
speed-testing.net
SSL/TLS Certificate
SSL/TLS Certificate for speed-testing.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.speed-testing.net
- Valid from
- Jul 9, 2026
- Valid until
- Oct 7, 2026 (33 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05254B6253AEC909A80C7556C688E2298C56
- SHA-256 fingerprint
- 3A:59:FF:C7:CB:A6:E0:9F:93:8D:A3:1F:58:17:F6:DD:3E:C0:00:78:40:8A:A0:F6:EF:C2:60:82:06:06:7C:07
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by speed-testing.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch speed-testing.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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