What powers circl.lu?
Last seen Jun 2026 · 29 technologies across 15 categories
Caching
Varnish
since May 2026
Development
Gitea
since Mar 2025
Font scripts
Font Awesome
since Aug 2018
JavaScript frameworks
JavaScript graphics
Chart.js
since Nov 2024
JavaScript libraries
Message boards
Mastodon
since Apr 2024
Miscellaneous
Open Graph
since Sep 2022
Popper
since Apr 2022
PWA
since Apr 2024
RSS
since Dec 2022
Webpack
since Apr 2024
Operating systems
Ubuntu
since Mar 2025
Programming languages
Rich text editors
Monaco Editor
since Mar 2025
Security
HSTS
since Sep 2022
UI frameworks
Bootstrap
since Jul 2019
Tailwind CSS
since Apr 2022
Web frameworks
Ruby on Rails
since Apr 2024
Web servers
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.
Audience
- 63% phone
- 37% desktop
Indonesia
United States
India
Countries where the site has Chrome traffic, strongest markets 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 | 2.4 s |
| INP | 150 ms |
| CLS | 0 |
| TTFB | 1700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 0.2 MB · 12 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
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 →
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Recent changes
- detected Varnish May 2026
- dropped SweetAlert2 Jan 2026