What powers 
sdc.org.uk?
Last seen Oct 2026 · 36 technologies across 17 categories
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
UI frameworks
Web servers
Webmail
WordPress plugins
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
AI Crawlers
No AI crawlers blocked
Audience
- 59% desktop
- 41% phone
United Kingdom
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.93 / 10 · ranked #623,904 of all domains
65 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.6 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 2800 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English (United Kingdom)
- Weight: 2.6 MB · 173 requests
- WordPress theme: sdc · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Society of Dyers and Colourists
- Country: United Kingdom
From Wikidata (CC0).
Infrastructure
- Hosted on KRYSTAL Krystal Hosting Ltd (77.72.2.154)
- DNS: zen.co.uk
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 87,969, 6 hosts
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 Backbone.js Oct 2026
- dropped Stripe Oct 2026
- dropped Underscore.js Oct 2026
- dropped WooCommerce Stripe Payment Gateway Oct 2026
- dropped PayPal Sep 2026
- dropped WooCommerce PayPal Payments Sep 2026
- dropped Apache HTTP Server Aug 2026
- dropped StackPath Aug 2026
- detected Backbone.js Jul 2026
- detected HTTP/3 Jul 2026
- detected jQuery CDN Jul 2026
- detected LiteSpeed Jul 2026
- detected Underscore.js Jul 2026
- detected WooCommerce Subscriptions Jul 2026
- detected Moment.js Jun 2026
- detected React May 2026
- detected PayPal Apr 2026
- detected WooCommerce PayPal Payments Apr 2026
- dropped WooCommerce Subscriptions Feb 2026
- detected Twitter Emoji (Twemoji) Jan 2026
- dropped Priority Hints Dec 2025