What powers welderunderground.org?
Last seen Oct 2026 · 30 technologies across 17 categories
Analytics
CDN
CMS
Ecommerce
Hosting
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
Video players
Webmail
AI Crawlers
Restricts 16 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- AI2Bot Restricted
- Applebot-Extended Restricted
- Bytespider Restricted
- CCBot Restricted
- ClaudeBot Restricted
- cohere-training-data-crawler Restricted
- FacebookBot Restricted
- Google-Extended Restricted
- GoogleOther Restricted
- GPTBot Restricted
- img2dataset Restricted
- meta-externalagent Restricted
- Webzio-Extended Restricted
Search and AI assistants
- Amazonbot Restricted
- DuckAssistBot Restricted
- YouBot Restricted
The other 17 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
16 of 33 AI crawlers restricted
Audience
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.46 / 10 · ranked #6,853,419 of all domains
6 referring domains · OpenPageRank
Page
- Language: English (United States)
- Weight: 15.2 MB · 150 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Squarespace (198.49.23.144)
- DNS: GoDaddy DNS
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 11,330,502
- Verified with: Google, LinkedIn
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.welderunderground.org | 24 |
| apply.welderunderground.org | 13 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Bokeh Oct 2026
- detected Python Oct 2026
- dropped Angular Sep 2026
- dropped TypeScript Sep 2026
- dropped Zone.js Sep 2026
- detected Google Analytics Aug 2026
- dropped Google Font API Aug 2026
- detected Facebook Pixel Jul 2026
- detected Amazon SES Jun 2026
- dropped Framer Sites Jun 2026
- dropped Google Analytics Jun 2026
- dropped HTTP/3 Jun 2026
- dropped Lenis Jun 2026
- dropped React Jun 2026
- dropped TikTok Pixel Jun 2026
- detected Amazon S3 May 2026
- detected Amazon Web Services May 2026
- detected Angular May 2026
- detected Cart Functionality May 2026
- detected core-js May 2026
- detected Modernizr May 2026
- detected reCAPTCHA May 2026
- detected Sentry May 2026
- detected Squarespace May 2026
- detected Squarespace Commerce May 2026
- detected Stimulus May 2026
- detected TypeScript May 2026
- detected YUI May 2026
- detected Zone.js May 2026