Companies using mailhostbox in United States
As of 4 November 2026, 10,299 US companies show mailhostbox: 10,299 on their website or in DNS records and 0 in their own job postings, led by San Francisco.
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Top city
- San Francisco · 319
- In both sources
- 0
- Team that names it most
- –
US companies on mailhostbox
No US company names mailhostbox in its job postings yet; the 10,299 companies in the footprint carry it on their website or in DNS.
Open the sales or marketing leader at each one with a verified e-mail, or get new US mailhostbox users every Monday.
Start free, no card. The first 20 are above; e-mails are verified at the mail server when you open them.
By city, company size, industry and team
Footprint tables first (website or DNS), then the companies whose postings name mailhostbox.
| companies | share | |
|---|---|---|
| San Francisco | 319 | 3% |
| Pittsford | 45 | 0% |
| New York | 44 | 0% |
| Houston | 34 | 0% |
| Atlanta | 25 | 0% |
| Las Vegas | 17 | 0% |
| Miami | 17 | 0% |
| Chicago | 16 | 0% |
| Dallas | 15 | 0% |
| Dubai | 14 | 0% |
| companies | share | |
|---|---|---|
| Self-employed | 5,363 | 52% |
| 2-10 employees | 2,372 | 23% |
| 11-50 employees | 2,019 | 20% |
| 51-200 employees | 375 | 4% |
| 201-500 employees | 127 | 1% |
| 501-1000 employees | 28 | 0% |
| 1001-5000 employees | 10 | 0% |
| 5001-10000 employees | 1 | 0% |
| 10,001+ employees | 4 | 0% |
| companies | share |
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mailhostbox everywhere, and other tools here
All companies using mailhostbox →
Companies hiring sales in United States →
compared →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
10,299 US companies show mailhostbox: 10,299 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/mailhostbox/united-states)
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 US 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.
mailhostbox in United States: questions
Is this every US company on mailhostbox?
It is every US company whose website, DNS records or own job postings show it: 10,299 in total. Companies that use mailhostbox without any public trace are not counted.
What does "United States" 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 US list with e-mails?
Sign up, filter companies on mailhostbox and United States, and open the people you want. Counting is free; the first 1,000 results are too.
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The same data as a search, over MCP and the API, as bulk files, or pushed to you as it changes.
Every US company on mailhostbox,
with the person who owns it
Filter on mailhostbox and United States. Start free, no card.