What powers celsian.nl?
Last seen Aug 2026 · 21 technologies across 14 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
Video players
Web servers
Webmail
WordPress plugins
WordPress themes
AI Crawlers
Blocks 4 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Bytespider Blocked
Search and AI assistants
- Amazonbot Blocked
- Applebot Blocked
- PetalBot Blocked
The other 29 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
4 of 33 AI crawlers blocked
Open Page Rank
3.05 / 10 · ranked #1,505,605 of all domains
17 referring domains · OpenPageRank
Page
- Language: English (United States)
- Weight: 3.3 MB · 101 requests
- WordPress theme: astra (child: astra-child) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Celsian
- Profiles: LinkedIn
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on AS-XYNTA (185.133.88.156)
- DNS: masterdns.nl
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC reject, DNSSEC signed, CAA
- SSL: Sectigo, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 11,349,108, 5 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
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Recent changes
- detected Twitter Emoji (Twemoji) Dec 2025