Contractor License Proof

Mainline Security Inc

Licensed

Verified against CSLB on · View on CSLB

License details

License number
838913
Status
Active
Classifications
C-28 · Lock and Security Equipment
Contractor bond
$25,000
Workers' comp
Covered
License term on file
May 22, 2004 – May 31, 2028

Business

  • (415) 398 6161 (CSLB public record)
  • 617 SEVENTH ST, San Francisco, CA 94103San Francisco County

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Frequently asked questions

Is Mainline Security Inc licensed in California?

Yes. Mainline Security Inc holds an active California state contractor license (CSLB #838913), verified against the CSLB public record on August 4, 2026.

What is Mainline Security Inc's CSLB license number?

Mainline Security Inc's California contractor license number is 838913. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.

What kind of work is Mainline Security Inc licensed for?

Mainline Security Inc is classified under Lock and Security Equipment (C-28) by the CSLB.

How do I verify Mainline Security Inc's license myself?

Look up license #838913 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of August 4, 2026.

Verify it yourself: How to verify a California contractor license · Look up #838913 on CSLB

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