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Websites using ef.js

29 websites detected · Updated Oct 7, 2026

What is ef.js?

ef.js is a technology in the Programming Framework category. 29 websites use ef.js, detected by Hunter on Oct 7, 2026.

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The websites using ef.js

A sample of the websites Hunter detects ef.js on, ordered by web popularity.

Domain name Industry
1
jointcommission.org
Hospitals and Health Care 995 email addresses
2
leetchi.com
Internet Publishing 38 email addresses
3
nttdata.com
Information Technology and Services 1,903 email addresses
4
rockwellautomation.com
Automation Machinery Manufacturing 13,823 email addresses
5
fnac.pt
Retail 93 email addresses
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You have 29 sites. Now reach the people.

Hunter already holds email addresses at all 27 websites listed above.

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Who uses ef.js

Websites running ef.js, counted by industry and by country. Only the largest groups are shown.

By industry

Industry Websites
Professional Services 6
Manufacturing 4
Technology, Information and Media 4
Administrative and Support Services 4
Financial Services 2
Information Technology and Services 2
Hospitals and Health Care 1
Retail 1
Utilities 1
Transportation, Logistics, Supply Chain and Storage 1
Industrial Automation 1

By country

Country Websites
United States of America 11
Germany 3
Finland 2
Türkiye 2
Canada 1
Switzerland 1
France 1
United Kingdom of Great Britain and Northern Ireland 1
Japan 1
Luxembourg 1
Namibia 1
Norway 1

Hunter detects ef.js on 29 websites. The figure comes from Hunter's own crawl of company websites and is rebuilt every night, so it moves as sites adopt and drop the technology.

The table on this page is a sample of the websites running ef.js, ordered by web popularity, with the industries they are in and how many email addresses Hunter holds for each. Create a free account to search any of them and see the addresses.

The websites Hunter detects ef.js on most often also run C, Docker and git.

ef.js is one of the Programming Framework technologies Hunter tracks. Others it detects widely include jQuery, jQuery Migrate and Bootstrap.

Yes — that is what Hunter is for. The last column of the table shows how many email addresses Hunter already holds for a website, where it has found any. Sign up to see the addresses themselves, with the name and job title of the person behind each one.
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