Operating signal within 12 months from two or more independent sources.
What they make
Office Supplies (except Paper) Manufacturing339940- rubber stamps
- nametags
- desk signs
- corporate kits
- professional seals
- self-inking
- wooden hand stamps
- numbering
- inspection
- dater stamps
- solar panels
NAMED ON THE COMPANY’S OWN WEBSITE, READ SEP 9, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| National Banner INC. | San Diego | Sign Manufacturing 339950 | ACTIVE | 0.1 KM |
| Signs Done Fast, INC. | San Diego | Sign Manufacturing 339950 | UNVERIFIED | 0.2 KM |
| San Diego Die Cutting INC | San Diego | Support Activities for Printing 323120 | ACTIVE | 0.3 KM |
| Smc Signs, INC. | San Diego | Sign Manufacturing 339950 | LIKELY ACTIVE | 0.5 KM |
| Vera Communities, LLC | San Diego | Office Supplies (except Paper) Manufacturing 339940 | LIKELY ACTIVE | 1.3 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
3 sources hold this plant, and 10 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
- The company’s own websiteOPERATINGfirst seen SEP 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord EDCXUH6CK5G4 · first seen JUL 2026 · last seen JUL 2026
- DOL Form 5500 retirement plan filingsOPERATINGRecord 464394017|CA|92110|3341 hancock st · first seen JUN 2025 · last seen JUN 2025
IN SAN DIEGO COUNTY248 other plants share this one’s industry (Other Miscellaneous Manufacturing, NAICS 3399); 56 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- SAM.gov: ON-LINE STAMPCO INC · JUL 2026
- Street address
- SAM.gov: 3341 HANCOCK ST · JUL 2026
- City
- SAM.gov: SAN DIEGO · JUL 2026
- State
- SAM.gov: CA · JUL 2026
- Coordinates
- Census geocoder: 32.755110885887,-117.206625933695 · SEP 2026
- Employees (band)
- DOL: 1-19 · JUN 2025
- Website
- SAM.gov: http://www.calstamp.com · JUL 2026
- CAGE code
- SAM.gov: 4K8B4 · JUL 2026
- Retirement plan filing (Form 5500)
- DOL: 5 active participants, plan year ending 2025-06-30, 1 plan(s) · JUN 2025
- SAM registration expires
- SAM.gov: 2027-07-07 · JUL 2026