Licensed Low Voltage Systems (C-7) contractors in Livermore, CA

The California Contractors State License Board (CSLB) lists 27 Low Voltage Systems (C-7) contractors in Livermore, California. Each links to a full dossier with license status, insurance, bond, and enforcement — as of August 11, 2026.

27 contractors

1. Ag Security Services INC

   Livermore, CA · CSLB #982618 · as of August 11, 2026
   Active · clear
2. Alantec Corrosion Control INC

   Livermore, CA · CSLB #1077722 · as of August 11, 2026
   Active · clear
3. All-guard Alarm Systems INC

   Livermore, CA · CSLB #398874 · as of August 11, 2026
   Active · clear
4. Ams.net LLC

   Livermore, CA · CSLB #763508 · as of August 11, 2026
   Active · clear
5. Bay Area Security Specialists INC

   Livermore, CA · CSLB #950344 · as of August 11, 2026
   Active · clear
6. Direct Current Systems

   Livermore, CA · CSLB #1037185 · as of August 11, 2026
   Active · clear
7. Elb US INC.

   Livermore, CA · CSLB #989518 · as of August 11, 2026
   Active · clear
8. Erickson R Communication

   Livermore, CA · CSLB #929391 · as of August 11, 2026
   Active · clear
9. Ezell's Telephone Company, E-z Tel INC

   Livermore, CA · CSLB #452985 · as of August 11, 2026
   Active · clear
10. Laser Security Systems INC

    Livermore, CA · CSLB #404142 · as of August 11, 2026
    Active · clear
11. Martins Communications

    Livermore, CA · CSLB #1103816 · as of August 11, 2026
    Active · clear
12. Menlo Technology Services

    Livermore, CA · CSLB #1123689 · as of August 11, 2026
    Active · clear
13. Mycom Communications INC

    Livermore, CA · CSLB #1028507 · as of August 11, 2026
    Active · clear
14. Network Cabling Company

    Livermore, CA · CSLB #982852 · as of August 11, 2026
    Active · clear
15. Sound & Signal INC

    Livermore, CA · CSLB #494676 · as of August 11, 2026
    Active · clear
16. Space Age Satellite

    Livermore, CA · CSLB #813932 · as of August 11, 2026
    Active · clear
17. Ryan Stewart Communications

    Livermore, CA · CSLB #1023491 · as of August 11, 2026
    Active · clear
18. Structure Net INC

    Livermore, CA · CSLB #1064400 · as of August 11, 2026
    Active · clear
19. Summit A V & Automation INC

    Livermore, CA · CSLB #1055563 · as of August 11, 2026
    Active · clear
20. Three Alarm Electrical Systems INC

    Livermore, CA · CSLB #944907 · as of August 11, 2026
    Active · clear
21. Three Alarm Fire Protection

    Livermore, CA · CSLB #884552 · as of August 11, 2026
    Active · clear
22. Top Tier Communication

    Livermore, CA · CSLB #976279 · as of August 11, 2026
    Active · clear
23. Trojan Systems INC

    Livermore, CA · CSLB #637942 · as of August 11, 2026
    Active · clear
24. Uplink Cabling

    Livermore, CA · CSLB #1021668 · as of August 11, 2026
    Active · clear
25. Cmjn Avt

    Livermore, CA · CSLB #993859 · as of August 11, 2026
    Suspended · bond
26. Telcom Structured Cabling LLC

    Livermore, CA · CSLB #986647 · as of August 11, 2026
    Suspended
27. Professional Telecommunications Services INC

    Livermore, CA · CSLB #900567 · as of August 11, 2026
    Suspended · workers' comp

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Data sourced from the California Contractors State License Board (CSLB), current as of August 11, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.