Low-voltage contractor (C-7) in Ontario, CA
9 licenses · checked Oct 27, 2026
There are 9 Low-voltage contractor (C-7) licenses with an address of record in Ontario, CA, in the CSLB License Master data checked Oct 27, 2026. That is 1.2% of the 754 such licenses statewide; Ontario ranks #10 of 323 CA cities for this license type. They are spread across 3 ZIP codes; the most common are 91761 (5), 91762 (2), 91764 (2). Most list San Bernardino County. By business type: Corporation 5, Limited Liability 2, Sole Owner 2. The median first-issue year is 2018; the oldest license dates from 2016. 4 of them come up for renewal or expiration in the next 12 months, so re-check status before you sign a contract.
What a Low-voltage contractor (C-7) license covers
Low Voltage Systems (C-7) covers communications, alarm, voice, data and similar systems up to 91 volts.
How to verify a license
Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Official lookup: CSLB Instant License Check.
Low-voltage contractor (C-7) licenses in Ontario
Showing 9 of 9, A to Z. Listing order is alphabetical, not a recommendation.
- Advanced Monitoring INC#1035016 · 91761
- Alexander Installation & Technology Services LLC#1060170 · 91761
- Barnes Fiber Communications#1020360 · 91762
- LOW Volt INC#1059192 · 91761
- Mora-Data & Telecom Services#1058928 · 91762
- Resource ONE LOW Voltage Security INC#1037327 · 91761
- Solar Electrical Plus INC#1017526 · 91761
- Teleteks INC#1060559 · 91764
- Vg-Tech LLC#1022848 · 91764
Frequently asked questions
How many Low-voltage contractor (C-7) licenses are in Ontario?
9 active licenses in the CSLB License Master data checked Oct 27, 2026 (1.2% of CA).
What does a Low-voltage contractor (C-7) license cover?
Low Voltage Systems (C-7) covers communications, alarm, voice, data and similar systems up to 91 volts.
How do I verify a Low-voltage contractor (C-7) license in Ontario?
Enter the license number in CSLB Instant License Check and confirm the status is active, the classification matches the work, and the contractor has a current bond and workers' compensation coverage (or a valid exemption). California requires the license number on contracts and advertising. Use the license number shown here with the CSLB Instant License Check.
How many Ontario Low-voltage contractor (C-7) licenses expire soon?
4 of 9 have an expiration date in the next 12 months. A license that lapses must be renewed before the holder can work under it again.
Other license types in Ontario
General building contractor (45) · Electrical contractor (C-10) (31) · General engineering contractor (16) · Painting contractor (C-33) (13) · HVAC contractor (C-20) (13) · Plumbing contractor (C-36) (10) · Landscaping contractor (C-27) (7) · Drywall contractor (C-9) (6) · Tile contractor (C-54) (4) · Cabinet and finish carpentry contractor (C-6) (4) · Flooring contractor (C-15) (3) · Concrete contractor (C-8) (3)
All Low-voltage contractor (C-7) licenses in CA →
Source: CSLB License Master. Licensed California is independent and not affiliated with the licensing agency. Data checked Oct 27, 2026.