Mainline Security INC, C-28 Lock and Security Equipment Contractor in San Francisco, CA
Mainline Security INC operating as a corporation holds California contractor license #838913, which is currently expired (lapsed May 31, 2026) and not valid to contract until it is renewed. First issued in 2004, the license has been on the CSLB roster for 22 years. It carries a single CSLB classification: C-28 — Lock and Security Equipment Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and active workers' compensation coverage from State Farm General Insurance Company. The business is based in San Francisco, in San Francisco County, California.
- License Number
- 838913
- Issued
- May 22, 2004
- Status
- CLEAR
- Expires
- May 31, 2026
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 203893
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- State Farm General Insurance Company
- Policy Number
- 97ESH9576
- Effective
- Sep 10, 2025
- Expires
- Sep 10, 2026
This contractor has a compliance issue in its public CSLB record:
- License expired
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Mainline Security INC licensed in California?
Mainline Security INC previously held California Contractors State License Board license number 838913, but the license expired on May 31, 2026 and is not currently valid. It was first issued on May 22, 2004.
What does Mainline Security INC specialize in?
Mainline Security INC is licensed for one CSLB classification: C-28 Lock and Security Equipment Contractor.
Where is Mainline Security INC headquartered?
Mainline Security INC is headquartered at 617 Seventh St, San Francisco, CA 94103, in San Francisco County, California.
Does Mainline Security INC have an active surety bond on file with CSLB?
Yes. Mainline Security INC has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Mainline Security INC carry workers' compensation coverage?
Yes. Mainline Security INC carries active workers' compensation coverage through State Farm General Insurance Company.
How do I verify Mainline Security INC's contractor license?
You can verify Mainline Security INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=838913.
- License issuedMay 22, 2004
- Bond activeJan 1, 2023
- WC coverage startsSep 10, 2025
- License expiredMay 31, 2026
- WC expiredSep 10, 2026
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