What powers fftw.org?
Last seen Aug 2026 · 1 technologies across 1 categories
Web Servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| fftw | #1 | 160 |
| fourier transformation | #37 | 57 |
| fftw3 | #1 | 39 |
| fourier transformation software | #2 | 18 |
| fftw3 | #3 | 13 |
| libfftw3 | #1 | 9 |
| fft library | #1 | 9 |
| fortran example | #6 | 9 |
| fortran example | #6 | 9 |
| fftw download | #1 | 8 |
| fft 2 | #29 | 8 |
| fft c program | #4 | 7 |
| thread safety | #5 | 6 |
| fftw3 | #5 | 6 |
| fftw github | #3 | 3 |
| fft code | #7 | 2 |
| xeon e3-1220v3 | #10 | 1 |
| c code for fft | #15 | 1 |
| cell microprocessor | #51 | 1 |
| pruned | #35 | 1 |
| fftw3 h | #6 | 1 |
| fftw3 | #15 | 1 |
| fftw github | #7 | 1 |
| fft2 | #70 | 1 |
| fft coding | #8 | 1 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 58% phone
- 42% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
7.02 / 10 · ranked #39,775 of all domains
604 referring domains · OpenPageRank
Search traffic
380 est. monthly organic visits (US)
93 keywords in Google's top 30
Core Web Vitals
| LCP | 0.7 s |
| INP | 225 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.0 MB · 6 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Registered Jun 1999 (27 years) via Domain Registration Services, Inc. dba dotEarth.com, renews Jun 2029
- Hosted on A2 Hosting (216.137.187.110)
- DNS: fftw.org
- Email: fftw.org
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 26,293, 4 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| fftw.org | 1 |
| www.fftw.org | 1 |