What powers 
hart.amsterdam?
Last seen Aug 2026 · 14 technologies across 8 categories
Analytics
Google Analytics
since Jan 2019
JavaScript libraries
Maps
Google Maps
since Jan 2019
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Video players
Flowplayer
since Apr 2022
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
AI Crawlers
No AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.01 / 10 · ranked #560,953 of all domains
79 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 1.3 MB · 40 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ACNBB (83.98.140.23, IPv6)
- DNS: dn-s.nl
- Email: hart.amsterdam
- Email security: no SPF record, no DMARC record, MTA-STS, BIMI
- SSL: Let's Encrypt, ECDSA P384, expires Nov 2026
- Common Crawl link graph: rank 831,286, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted