What powers emf-portal.org?
Last seen Aug 2026 · 9 technologies across 7 categories
Analytics
Font scripts
JavaScript libraries
Miscellaneous
Security
UI frameworks
Web servers
AI Crawlers
Blocks 32 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- AI2Bot Blocked
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- FacebookBot Blocked
- Google-CloudVertexBot Blocked
- Google-Extended Blocked
- GoogleOther Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- img2dataset Blocked
- meta-externalagent Blocked
- PanguBot Blocked
- SBIntuitionsBot Blocked
- Webzio-Extended Blocked
Search and AI assistants
- Amazonbot Blocked
- Applebot Blocked
- Claude-SearchBot Blocked
- DuckAssistBot Blocked
- OAI-SearchBot Blocked
- PerplexityBot Blocked
- PetalBot Blocked
- YouBot Blocked
User-request fetchers
- ChatGPT-User Blocked
- Claude-User Blocked
- GoogleAgent-Mariner Blocked
- meta-externalfetcher Blocked
- MistralAI-User Blocked
- Perplexity-User Blocked
The other 1 AI crawler we track is not mentioned and only inherits the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| deoxyribonucleic acid | #65 | 950 |
| carotid artery | #88 | 280 |
| limbisches system | #55 | 160 |
| emf | #21 | 110 |
| specific absorption rate | #43 | 85 |
| magnetic field | #21 | 62 |
| low frequency | #7 | 61 |
| magnetic conductivity | #5 | 61 |
| carotid | #95 | 57 |
| temporal bone | #58 | 57 |
| seminal vesicle | #58 | 57 |
| occipital | #46 | 57 |
| oxidative stress | #54 | 57 |
| adenine | #56 | 57 |
| define deoxyribonucleic acid | #75 | 57 |
| carboxyl group | #48 | 47 |
| carbonyl | #49 | 47 |
| cooh group | #65 | 47 |
| radio wavelength | #51 | 47 |
| sine wave | #50 | 47 |
| radio frequency | #21 | 42 |
| oh group | #58 | 38 |
| microwave auditory effect | #5 | 34 |
| caenorhabditis elegans | #46 | 31 |
| nematode caenorhabditis elegans | #62 | 31 |
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
32 of 33 AI crawlers blocked
Audience
- 70% desktop
- 30% phone
Japan
Germany
United States
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.76 / 10 · ranked #131,787 of all domains
262 referring domains · OpenPageRank
Search traffic
4,000 est. monthly organic visits (US)
2,215 keywords in Google's top 30
Core Web Vitals
| LCP | 2.1 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 0.8 MB · 32 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on RWTH-AS (137.226.50.179)
- Email: rwth-aachen.de
- Email security: SPF (hard fail), DMARC reject, CAA
- SSL: HARICA, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 47,298, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted