What powers 
grayline.is?
Last seen Sep 2026 · 53 technologies across 24 categories
Advertising Networks
Analytics
CDN
CMS
Development
Ecommerce
Font Scripts
Hosting Panels
JavaScript frameworks
JavaScript Libraries
Maps
Miscellaneous
Operating systems
PaaS
Performance
Programming languages
Security
Tag managers
UI frameworks
Video Players
Web frameworks
Web servers
Widgets
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 56% phone
- 44% desktop
United States
Iceland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.05 / 10 · ranked #536,241 of all domains
97 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Vercel
- Weight: 2.0 MB · 66 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Icelandia
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Amazon Web Services (216.150.1.1)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 527,110, 4 hosts
- Verified with: Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.grayline.is | 27 |
| book.grayline.is | 21 |
| grayline.is | 20 |
Full technology history →
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Recent changes
- detected Turbopack Jul 2026
- dropped Google Hosted Libraries Jun 2026
- dropped Laravel Jun 2026
- dropped Lozad.js Jun 2026
- dropped Pingdom RUM Jun 2026
- dropped Swiper Jun 2026
- detected Amazon S3 May 2026
- detected Amazon Web Services May 2026
- detected Cloudinary May 2026
- detected core-js May 2026
- detected Facebook Pixel May 2026
- detected Headless UI May 2026
- detected HSTS May 2026
- detected Next.js May 2026
- detected Node.js May 2026
- detected Priority Hints May 2026
- detected Tailwind CSS May 2026
- detected Vercel May 2026