Masterclock, Inc.
Saint Charles, MO
- UEI
- SXT8K5HELZE8
- CAGE
- 1GZF9
- Primary NAICS
- 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
-
- 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing Primary
- 334418 Printed Circuit Assembly (Electronic Assembly) Manufacturing
- 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
- 334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
- 334519 Other Measuring and Controlling Device Manufacturing
- 513210 Software Publishers
- SAM.gov registration date
- Physical address
- 2484 W Clay St, St Charles, MO 63301, USA
- Website
- masterclock.com
- Founded
- 1994
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
-
- Information Technology
- Semiconductors & Semiconductor Equipment
- Semiconductors
- SIC code
- 36 Electronic & Other Electric Equipment
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Antennas | Drug Enforcement Administration | $21,533 | |
| 1U rack mount NTP/PTP/irig-b am master c | Naval Sea Systems Command | $24,558 | |
| GMR5000 multi-function grand master generator | Air Force Test Center | $13,970 | |
| Communication items | Drug Enforcement Administration | $20,542 | |
| Multi function grand generator | Naval Information Warfare Systems Command | $116,755 |
About Masterclock, Inc.
Masterclock, Inc. is a for-profit manufacturer of goods headquartered in St. Charles, Missouri, specializing in precision timing systems and related equipment for government agencies and aerospace companies. As an established corporate entity registered with SAM.gov since January 2002, the company has developed a proven track record supplying specialized equipment to multiple federal departments. Masterclock serves as a prime contractor to the federal government, providing critical infrastructure components that support operational needs across various defense and law enforcement agencies.
Masterclock's federal contract portfolio demonstrates expertise in manufacturing precision timing and communications equipment tailored to government specifications. The company has provided antenna equipment to the Drug Enforcement Administration ($21,533.36 in August 2025 and $20,542.00 in May 2022), multi-function grand master generators and time code distribution amplifiers to the Naval Information Warfare Systems Command ($116,754.90 in December 2021), a 1U rack mount NTP/PTP/IRIG-B AM master clock to Naval Sea Systems Command ($24,558.20 in June 2023), a GMR5000 multi-function grand master generator to the Air Force ($13,970.29 in June 2022), and a clock display unit (NTDS46-12AL) to the Naval Air Warfare Center ($12,480.00 in January 2021). All prime contract awards have been issued as purchase orders with firm fixed-price structures and no set-aside designations, reflecting direct acquisitions of commercial items. Additionally, Masterclock served as a subcontractor to Parsons Government Services Inc. in October 2021, providing services in support of federal requirements. The company's contract ceiling values have ranged from approximately $12,000 to $116,000, with most awards representing targeted procurements for specialized timing and communications components essential to naval operations, aerospace communications, and law enforcement infrastructure.
SBA capabilities narrative
We manufacture precise timing systems including digital display clocks, analog clocks, PCIe cards, time servers and generators, countdown timers, PCIe cards, and a variety of other complimentary products for use in time-sensitive operations.
Quick answers
What is Masterclock, Inc.'s UEI?
Masterclock, Inc.'s Unique Entity ID (UEI) in SAM.gov is SXT8K5HELZE8.
What is Masterclock, Inc.'s CAGE code?
Masterclock, Inc.'s CAGE code is 1GZF9.
What is Masterclock, Inc.'s primary NAICS code?
Masterclock, Inc.'s primary NAICS code is 334220 (Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing).
Where is Masterclock, Inc. located?
Masterclock, Inc.'s physical address in SAM.gov is 2484 W Clay St, St Charles, MO 63301, USA.
Is Masterclock, Inc. registered in SAM.gov?
Yes. Masterclock, Inc.'s SAM.gov registration is active through September 3, 2027.
What is Masterclock, Inc.'s most recent federal award?
Masterclock, Inc.'s most recent federal contract award is Antennas (15DDST25P00000094), from Drug Enforcement Administration, on August 28, 2025.
On GovTribe
See Masterclock, Inc.'s full federal record
- Federal contract awards
- IDV awards
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors