What powers esfi.org?
Last seen Jun 2026 · 41 technologies across 20 categories
Advertising
Analytics
CDN
CMS
Databases
Font scripts
Hosting
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
Tag managers
UI frameworks
Video players
Widgets
WordPress plugins
WordPress themes
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| tamper proof outlets | #2 | 880 |
| electrical | #6 | 830 |
| national electrical code | #3 | 640 |
| nec national electrical code | #3 | 640 |
| nec code | #3 | 640 |
| tamper resistant outlet | #3 | 530 |
| electrical system | #2 | 470 |
| household electricity | #1 | 400 |
| what is nec electrical | #1 | 300 |
| space heater safety tips | #1 | 300 |
| portable heater safety tips | #1 | 300 |
| house electrical | #1 | 300 |
| how to become an electrician | #9 | 270 |
| powerlines | #16 | 260 |
| tamper resistant | #1 | 220 |
| nec electrical | #3 | 210 |
| electrical circuit overload | #3 | 190 |
| space heater | #24 | 170 |
| afci | #7 | 170 |
| arc fault protection | #4 | 160 |
| arc fault | #4 | 160 |
| lithium ion charge | #10 | 150 |
| what is nec code | #1 | 150 |
| tamper proof receptacles | #1 | 150 |
| downed | #15 | 140 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 51% desktop
- 49% phone
United States
India
Canada
Philippines
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.44 / 10 · ranked #21,098 of all domains
1,314 referring domains · OpenPageRank
Search traffic
15,900 est. monthly organic visits (US)
3,877 keywords in Google's top 30
Core Web Vitals
| LCP | 3.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 2900 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 3.7 MB · 200 requests
- WordPress theme: hello-elementor (child: hellochildtheme) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.esfi.org | 35 |
| esfi.org | 30 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Jetpack Jun 2026