Tools · 21cn mail · China

Companies using 21cn mail in China_

As of 4 November 2026, 60 Chinese companies show 21cn mail: 60 on their website or in DNS records and 0 in their own job postings, led by Dongguan.

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

Top city
Dongguan · 4
In both sources
0
Team that names it most
–
60Chinese companies show 21cn mail, all sources
60on their website or in DNS records
0name it in job postings · 0 open
Dongguancity with most 21cn mail companies · 4
02 — Who uses it

Chinese companies on 21cn mail

No Chinese company names 21cn mail in its job postings yet; the 60 companies in the footprint carry it on their website or in DNS.

0 Chinese companies match this filter; 60 show 21cn mail in total.

Open the sales or marketing leader at each one with a verified e-mail, or get new Chinese 21cn mail users every Monday.

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03 — Breakdown

By city, company size, industry and team

Footprint tables first (website or DNS), then the companies whose postings name 21cn mail.

Footprint by city
companiesshare
Dongguan
47%
Shenzhen
35%
Ningbo
23%
Changsha
12%
Changzhou
12%
Chengdu
12%
Foshan
12%
Guangzhou
12%
Huizhou
12%
Jianchang
12%
Footprint by company size
companiesshare
Self-employed
23%
2-10 employees
58%
11-50 employees
610%
51-200 employees
3660%
201-500 employees
1017%
501-1000 employees
12%
Posting companies by city
companiesshare
Posting companies by size
companiesshare
Posting companies by industry
companiesshare
Postings by function
postings · companies
Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

60 Chinese companies show 21cn mail: 60 carry it on their website or in their DNS records, 0 name it in their own job postings, 0 do both. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/21cn-mail/china)
How we know

Read from the source, not self-reported

Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →

  • Job postingsRead hourly from the applicant tracking systems behind Chinese career sites. A tool counts when the employer's own text names it as the team's system.
  • CountryFrom the company's own website: imprint, address, phone prefix and language, with a confidence score. Not the posting's location.
  • Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
  • ExclusionsJob boards, portals and aggregators are kept out of company lists.
FAQ

21cn mail in China: questions

Is this every Chinese company on 21cn mail?

It is every Chinese company whose website, DNS records or own job postings show it: 60 in total. Companies that use 21cn mail without any public trace are not counted.

What does "China" mean here?

The country of the company, from its own website (imprint, address, phone prefix, language), not where the posting is located. A German company hiring in Paris still counts as German.

How do I get the Chinese list with e-mails?

Sign up, filter companies on 21cn mail and China, and open the people you want. Counting is free; the first 1,000 records are too.

Companies and people

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Every Chinese company on 21cn mail,
with the person who owns it

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