What powers ddialliance.org?
Last seen Sep 2026 · 19 technologies across 13 categories
CDN
CMS
JavaScript libraries
Marketing automation
Miscellaneous
Operating systems
PaaS
Security
UI frameworks
Video players
Web frameworks
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Aug 2026 robots.txt appeared
- Aug 2026 * added to robots.txt
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| ddi | #5 | 1,600 |
| scientific board | #2 | 120 |
| ddi | #83 | 70 |
| data documentation initiative | #1 | 21 |
| ddi data | #1 | 21 |
| ddi tools | #1 | 12 |
| codebook | #14 | 10 |
| data documentation | #8 | 8 |
| ddi training | #6 | 4 |
| codebook example | #8 | 3 |
| longitudinal data | #44 | 3 |
| data documentation initiative | #5 | 3 |
| surveys and questionnaires | #43 | 2 |
| ddi meaning | #74 | 2 |
| what is a codebook | #15 | 1 |
| polity dataset | #27 | 1 |
| markup examples | #26 | 1 |
| data documentation initiative | #11 | 1 |
| dataset codebook | #6 | 1 |
| ddi software | #22 | 1 |
| ddi acronym | #11 | 1 |
| cdi database | #21 | 0 |
| catalog record | #91 | 0 |
| survey questions bank | #12 | 0 |
| survey questionnaire in quantitative research | #24 | 0 |
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
Open Page Rank
6.46 / 10 · ranked #77,984 of all domains
262 referring domains · OpenPageRank
Search traffic
1,800 est. monthly organic visits (US)
66 keywords in Google's top 30
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 1.3 MB · 45 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- DDI Alliance
From Wikidata (CC0).
Infrastructure
- Registered Feb 2003 (23 years) via Amazon Registrar, Inc., renews Feb 2027
- Hosted on Cloudflare (199.60.103.37)
- Email: umich.edu
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 434,327, 8 hosts
- Verified with: Google
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 |
|---|---|
| registry.ddialliance.org | 10 |
| ddialliance.org | 9 |
| docs.ddialliance.org | 4 |