What powers 
circl.lu?
Last seen Aug 2026 · 29 technologies across 15 categories
Caching
Development
Font Scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Message boards
Miscellaneous
Operating systems
Programming languages
Rich text editors
Security
UI frameworks
Web frameworks
Web Servers
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| misp | #5 | 67 |
| cve search | #4 | 47 |
| misp install | #2 | 6 |
| sightings | #29 | 4 |
| passive dns | #3 | 3 |
| misp | #87 | 3 |
| misp | #31 | 3 |
| malware information sharing platform | #5 | 2 |
| misp malware information sharing platform | #4 | 2 |
| misp feed | #5 | 2 |
| hash lookup | #17 | 2 |
| file hash lookup | #9 | 2 |
| cve search | #24 | 2 |
| cve list | #60 | 2 |
| tlp:clear | #13 | 1 |
| tr 94 | #8 | 1 |
| vulnerability lookup | #6 | 1 |
| passive dns lookup | #9 | 1 |
| plugx | #60 | 1 |
| admiralty scale | #10 | 1 |
| historical dns records | #12 | 1 |
| cve lookup | #20 | 1 |
| cve api | #10 | 1 |
| whois project | #54 | 0 |
| x google smtp source | #82 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
AI Crawlers
No AI crawlers blocked
Audience
United States
India
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
7.02 / 10 · ranked #39,549 of all domains
479 referring domains · OpenPageRank
Search traffic
160 est. monthly organic visits (US)
118 keywords in Google's top 30
Core Web Vitals
| LCP | 3.3 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 0.2 MB · 12 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Computer Incident Response Center Luxembourg
- Country: Luxembourg
From Wikidata (CC0).
Infrastructure
- Hosted on CIRCL (185.194.93.14)
- DNS: eurodns.com
- Email: circl.lu
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: DigiCert, RSA 2048, wildcard, expires Oct 2026
- Common Crawl link graph: rank 29,041, 30 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| helga.circl.lu | 10 |
| cve.circl.lu | 9 |
| cvepremium.circl.lu | 9 |
| vulnerability.circl.lu | 9 |
| social.circl.lu | 8 |
| lookyloo.circl.lu | 7 |
| typosquatting-finder.circl.lu | 6 |
| circl.lu | 4 |
| www.circl.lu | 4 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Varnish May 2026
- dropped SweetAlert2 Jan 2026