What powers 
surfsara.nl?
Last seen Sep 2025 · 18 technologies across 10 categories
Analytics
Matomo
since Aug 2018
CMS
Font Scripts
Font Awesome
since Aug 2018
JavaScript frameworks
Backbone.js
since Oct 2022
JavaScript libraries
Programming Languages
PHP
since Aug 2018
Rich text editors
Monaco Editor
since Dec 2024
Security
HSTS
since Oct 2022
UI frameworks
Web servers
Apache HTTP Server
since Aug 2018
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Oct 2026 *: Restricted (was Blocked)
- Sep 2026 *: Blocked (was Restricted)
- Aug 2026 *: Restricted (was Blocked)
- Aug 2026 *: Blocked (was Restricted)
AI Crawlers
No AI crawlers blocked
Open Page Rank
5.59 / 10 · ranked #148,050 of all domains
121 referring domains · OpenPageRank
Organisation
- SURFsara
- Country: Netherlands
From Wikidata (CC0).
Infrastructure
- Registered Jan 2012 (14 years) via SURF B.V.
- Hosted on SURFNET-NL SURF B.V. (145.100.20.5, IPv6)
- DNS: surfnet.nl
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: HARICA, ECDSA P256, expires Feb 2027
- Common Crawl link graph: rank 486,384, 51 hosts
- Verified with: Adobe, Apple Business, Google, Have I Been Pwned, Microsoft 365
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| universiteitleiden.data.surfsara.nl | 14 |
| uva.data.surfsara.nl | 14 |
| fontys.data.surfsara.nl | 13 |
| hu.data.surfsara.nl | 13 |
| hva.data.surfsara.nl | 13 |
| tue.data.surfsara.nl | 13 |
| userinfo.surfsara.nl | 7 |
| ou.data.surfsara.nl | 3 |