Operating signal within 12 months from two or more independent sources.
What they make
Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing334220Masterclock manufactures timing and frequency solutions including master clocks (GMR series), NTP servers, PC cards, digital display clocks, amplifiers, and production timers. The company serves the aerospace and defense, media, commercial enterprise, and automation industries.
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Commercial Electronics | Earth City | Telephone Apparatus Manufacturing 334210 | LIKELY ACTIVE | 4.0 KM |
| Potter Electric Signal Company - St. Louis | Hazelwood | Other Communications Equipment Manufacturing 334290 | LIKELY ACTIVE | 9.0 KM |
| Sump Alarm, INC | Saint Louis | Other Measuring and Controlling Device Manufacturing 334519 | ACTIVE | 11.3 KM |
| Conference Technologies, INC. | Maryland Heights | Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220 | ACTIVE | 11.2 KM |
| Metro Medical Equipment & Supply, INC. | Saint Ann | Electromedical and Electrotherapeutic Apparatus Manufacturing 334510 | ACTIVE | 11.4 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 9 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| SAM GOV | OPERATING | FEB 2026 | FEB 2026 |
| OSHA ITA | OPERATING | DEC 2025 | DEC 2025 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | SAM GOV | FEB 2026 |
| CAGE CODE | SAM GOV | FEB 2026 |
| CITY | SAM GOV | FEB 2026 |
| EMPLOYEE BAND | OSHA ITA | DEC 2025 |
| GEOM | CENSUS GEOCODER | JUL 2026 |
| NAME | SAM GOV | FEB 2026 |
| REGISTRATION EXPIRATION | SAM GOV | FEB 2026 |
| STATE | SAM GOV | FEB 2026 |
| WEBSITE | SAM GOV | FEB 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.