What powers 
rgsg.co.uk?
Last seen Sep 2026 · 49 technologies across 26 categories
Accessibility
AccessiBe
since Aug 2025
Analytics
Authentication
Apple Sign-in
since Nov 2022
Google Sign-in
since Nov 2022
Caching
WP Rocket
since Sep 2022
CDN
CMS
Cookie compliance
Databases
MySQL
since Oct 2021
Editors
CodeMirror
since Nov 2022
Amazon SES
since Jul 2025
Font scripts
Google Font API
since Oct 2021
Typekit
since Oct 2021
Issue trackers
JavaScript graphics
Chart.js
since Nov 2022
JavaScript libraries
OWL Carousel
since Feb 2022
web-vitals
since Feb 2022
Marketing automation
Sendinblue
since Jan 2023
Miscellaneous
Babel
since Nov 2022
HTTP/3
since Mar 2025
Issuu
since Dec 2025
Open Graph
since Sep 2022
PWA
since Nov 2022
PaaS
Performance
Priority Hints
since Jun 2024
Programming languages
PHP
since Oct 2021
Security
Tag managers
Google Tag Manager
since May 2021
UI frameworks
Bootstrap
since Feb 2022
Video players
Vimeo
since Oct 2021
Web servers
Apache HTTP Server
since Oct 2021
Webmail
Apple iCloud Mail
since Jan 2023
Microsoft 365
since Aug 2022
WordPress plugins
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
- Sep 2026 * removed from robots.txt
- Sep 2026 llms.txt removed
- Sep 2026 robots.txt removed
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 56% phone
- 44% desktop
United Kingdom
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.43 / 10 · ranked #969,742 of all domains
52 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 75 ms |
| CLS | 0.2 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United Kingdom)
- CDN: Cloudflare
- Weight: 0.9 MB · 46 requests
- WordPress theme: schoolcms · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Royal Grammar School Guildford
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (162.159.134.42)
- DNS: mtgsy.co.uk
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: DigiCert, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 11,730,500, 3 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| parents.rgsg.co.uk | 25 |
| www.rgsg.co.uk | 25 |
| visit.rgsg.co.uk | 21 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Azure Sep 2026
- detected Azure Monitor Sep 2026
- detected Issuu Dec 2025