Contractor License Proof

Mas Service

Licensed

Verified against CSLB on · View on CSLB

License details

License number
498289
Status
Active
Classifications
C-20 · Warm-Air Heating, Ventilating and Air-ConditioningC-38 · Refrigeration
Contractor bond
$25,000
Workers' comp
Covered
License term on file
September 15, 1986 – June 30, 2028

Business

  • (888) 314 0451 (CSLB public record)
  • 5083 LONE TREE WAY, Antioch, CA 94531Contra Costa County

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Frequently asked questions

Is Mas Service licensed in California?

Yes. Mas Service holds an active California state contractor license (CSLB #498289), verified against the CSLB public record on June 17, 2026.

What is Mas Service's CSLB license number?

Mas Service's California contractor license number is 498289. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=498289

What kind of work is Mas Service licensed for?

Mas Service is classified under Warm-Air Heating, Ventilating and Air-Conditioning (C-20) by the CSLB.

How do I verify Mas Service's license myself?

Look up license #498289 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=498289. This page reflects the CSLB public record as of June 17, 2026.

See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.