TWILIGHT SECURITY & INVESTIGATION INC
License
- Status
- CLEAR
- First issued
- October 1, 1984
- Expires
- October 31, 2026
- Entity
- Corporation
- Address of record
- P O BOX 881506, San Francisco, CA 94188
- Phone of record
- (415) 252 1955
Contractor bond
- Surety
- AMERICAN CONTRACTORS INDEMNITY COMPANY
- Bond number
- SC851505
- Amount
- $25,000
- Effective
- January 1, 2023
Workers’ compensation
- Carrier
- CRUM & FORSTER INDEMNITY COMPANY
- Policy number
- 4087535814
- Effective
- January 1, 2026
- Expires
- January 1, 2027
Are they licensed for your job?
A California contractor may only contract for work their classification covers. Pick the job and this reads the license on file against it.
Licensed to perform
A contractor may only contract for work within their classifications. See all 54 licensed low voltage systems contractors in San Francisco.
People on this license
| Name | Title | Since | Through |
|---|---|---|---|
| SISON-WONG ANTOINETTE MARIE | Officer | June 8, 2026 | Current |
| WONG ALTON BOCK JR | Responsible Managing Officer/Chief Executive Officer/President | October 13, 2004 | Current |
| WONG LINDA MAR | Officer | October 1, 1984 | Current |
| WONG MATTHEW ALTON SISON | Officer | June 8, 2026 | Current |
| WONG ALTON BOCK JR | Responsible Managing Officer | October 1, 1990 | October 13, 2004 |
| WONG ALTON BOCK JR | Responsible Managing Officer | May 28, 2002 | January 1, 2004 |
| WONG ALTON BOCK JR | Responsible Managing Officer | October 1, 1984 | October 1, 1990 |
| WONG ALTON BOCK SR | Chief Executive Officer/President | October 1, 1984 | October 13, 2004 |
Verified status badge
Put this on your website or in a bid packet. It reads the state’s record live every time someone loads it, so it is never a screenshot of a good day. Free, and you don’t need to claim this listing to use it.
<a href="https://bookofbuilders.com/license/463356" target="_blank" rel="noopener">
<img src="https://bookofbuilders.com/badge/463356.svg" alt="TWILIGHT SECURITY & INVESTIGATION INC — California contractor license #463356 status, verified against CSLB records" width="268" height="76">
</a>The badge shows whatever the CSLB record says — including a suspension or lapsed coverage. There is no paid version and no way to change what it displays. That is what makes it worth showing. The same data as JSON if you’d rather build your own.
Is this your license?
Claim this page to add your photos, description, service area and contact details. The state’s record above stays exactly as it is — claiming adds to a page, it never edits or hides anything the CSLB reports.
Source: California Contractors State License Board public records. Coverage lapse is evaluated against today’s date; all other fields reflect the latest weekly CSLB file. Confirm at the CSLB’s official record before signing a contract.