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Masterclock, INC.

2484 W Clay St, Saint Charles, MO 63301

ACTIVELAST SEEN IN FEDERAL DATA SEP 2026 · 3 SOURCES

Operating signal within 12 months from two or more independent sources.

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Homepage of Masterclock, INC.
Their homepage, crawled JUL 2026

What they make

Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing334220

The company makes timing and frequency solutions, including master clocks, NTP servers, PC cards, amplifiers, and digital clocks. It performs in-house engineering, manufacturing, and research to skip Commercial Enterprise, Automation, Aerospace & Defense, and Media industries are served. The company provides customer support accessible 365 then 365 days a year.

SUMMARIZED FROM THE COMPANY’S OWN WEBSITE

Where it is

38.78418, -90.51268 · CENSUS TIGER
COUNTY
METRO AREA
ON GOOGLE MAPS
STREET VIEW

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Every listed plant in St. Charles County

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.

SourceEvidenceFirst seenLast seen
SAM GOVOPERATINGFEB 2026SEP 2026
COMPANY SITEOPERATINGJUL 2026AUG 2026
OSHA ITAOPERATINGDEC 2025DEC 2025
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
FIELDSOURCESIGNAL
ADDRESS LINE1SAM GOVSEP 2026
CAGE CODESAM GOVSEP 2026
CITYSAM GOVSEP 2026
EMPLOYEE BANDOSHA ITADEC 2025
GEOMCENSUS GEOCODERJUL 2026
NAMESAM GOVSEP 2026
REGISTRATION EXPIRATIONSAM GOVSEP 2026
STATESAM GOVSEP 2026
WEBSITESAM GOVSEP 2026

Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

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