What powers 
seahistory.org?
Last seen Aug 2026 · 33 technologies across 19 categories
Analytics
CDN
CMS
CRM
Databases
Font scripts
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
Page builders
Performance
Programming languages
Security
SEO
UI frameworks
Webmail
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Aug 2026 *: Allowed (was Restricted)
AI Crawlers
No AI crawlers blocked
Audience
- 64% desktop
- 36% phone
United States
United Kingdom
Australia
Canada
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.76 / 10 · ranked #271,974 of all domains
139 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 4200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- CDN: Cloudflare, Fastly
- Weight: 4.1 MB · 111 requests
- WordPress theme: bb-theme (child: nmhs) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- National Maritime Historical Society
- Country: United States
- Profiles: Facebook
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.38.134, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 554,408, 3 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| seahistory.org | 32 |
| ijnh.seahistory.org | 16 |
Full technology history →
Report an incorrect detection
Recent changes
- detected jQuery UI Jul 2026
- detected Popup Maker Jul 2026
- detected Yoast SEO Premium Jul 2026
- dropped Autoptimize Jun 2026
- dropped LazySizes Jun 2026
- detected Formidable Form May 2026
- dropped Formidable Form Jan 2026
- dropped Modern Image Formats Jan 2026
- detected Twitter Emoji (Twemoji) Jan 2026
- detected Autoptimize Dec 2025
- detected LazySizes Dec 2025
- detected Cloudflare Browser Insights Nov 2025