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Products & Services
About 21 Masters
This profile covers 21 Masters, a company classified under Professional and Management Development Training, based in Diamond Bar, California, United States, operating in Office service, employing 6-10 people and reporting $0M-$1M in annual revenue.
Its primary NAICS classification is 611430 (Professional and Management Development Training). 21 Masters is one of 2,121,238 Industrial & mechanical companies listed in California.
Business Contact Information
- Address
- 2500 Clear Creek Ln, Diamond Bar, California, 91765, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 61Educational Services
- 6114Business Schools and Computer and Management Training
- 611430Professional and Management Development Training
SIC Codes
- 82Educational Services
- 829Schools And Educational Services, Not Elsewhere
- 8299Automobile Driving Schools
Company Details
- Employees
- 8 (6-10)
- Annual Revenue
- $548,000 ($0M-$1M)
21 Masters: frequently asked questions
What does 21 Masters do?
This profile covers 21 Masters, a company classified under Professional and Management Development Training, based in Diamond Bar, California, United States, operating in Office service, employing 6-10 people and reporting $0M-$1M in annual revenue.
Where is 21 Masters located?
21 Masters is headquartered at 2500 Clear Creek Ln, Diamond Bar, California, 91765, United States.
How many employees does 21 Masters have?
21 Masters has about 8 employees (the 6-10 range).
What is 21 Masters's annual revenue?
21 Masters's annual revenue is estimated at $548,000 (the $0M-$1M range).
What industry is 21 Masters in?
21 Masters is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 611430 (Professional and Management Development Training).
What companies are similar to 21 Masters?
Other large industrial & mechanical companies in California include State of California, TD SYNNEX Corp, University of California and Ingram Micro Holding Corp.
Largest industrial & mechanical companies in California
Largest companies in California
Largest industrial & mechanical companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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