What powers serpentstail.com?
Last seen Sep 2026 · 35 technologies across 17 categories
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
Performance
Photo galleries
Programming languages
Security
Video players
Widgets
WordPress plugins
AI Crawlers
Blocks 5 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- Google-Extended Blocked
- ClaudeBot Allowed
- GPTBot Allowed
Search and AI assistants
- PetalBot Blocked
- PerplexityBot Allowed
User-request fetchers
- ChatGPT-User Allowed
The other 24 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
5 of 33 AI crawlers blocked
Audience
- 57% desktop
- 43% phone
United Kingdom
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #345,966 of all domains
192 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3 s |
| INP | 75 ms |
| CLS | 0.15 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United Kingdom)
- CDN: Cloudflare
- Weight: 4.7 MB · 167 requests
- WordPress theme: storefront (child: profile-books) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Serpent's Tail (Serpent’s Tail on Wikidata)
- Founded: 1986
- Country: United Kingdom
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.22.232, IPv6)
- DNS: Cloudflare DNS
- Email: Mimecast
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 500,329, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped WP Featherlight Aug 2026
- detected HTTP/3 Jun 2026
- dropped Microsoft 365 May 2026
- detected LazySizes Feb 2026
- detected Twitter Emoji (Twemoji) Dec 2025