What powers 
support-allergy.com?
Last seen Oct 2026 · 15 technologies across 13 categories
Advertising
Linkedin Ads
since Aug 2024
CDN
Amazon CloudFront
since Dec 2021
Amazon S3
since Aug 2024
Cookie compliance
OneTrust
since Aug 2025
JavaScript frameworks
JavaScript libraries
LazySizes
since Mar 2022
Load balancers
Amazon ALB
since Dec 2021
Miscellaneous
Open Graph
since Aug 2025
PaaS
Amazon Web Services
since Dec 2021
Search engines
Algolia
since Aug 2024
Security
HSTS
since Sep 2023
UI frameworks
Bootstrap
since Aug 2025
Tailwind CSS
since Apr 2022
Video players
VideoJS
since Dec 2021
Web servers
Nginx
since Dec 2021
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 80% phone
- 21% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.80 / 10 · ranked #713,574 of all domains
52 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.5 s |
| INP | 75 ms |
| CLS | 0.15 |
| TTFB | 2200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese (Japan)
- CDN: Amazon CloudFront
- Weight: 1.4 MB · 59 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (54.247.151.159)
- DNS: sanofi-synthelabo.com
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC reject
- SSL: Amazon Trust Services, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 10,210,361, 2 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Google Analytics Oct 2026
- dropped Google Tag Manager Oct 2026
- dropped Microsoft Clarity Oct 2026
- detected Microsoft Clarity Jan 2026