00:40:45:00:00:00 ====> 00:40:45:FF:FF:FF

The maximum devices for this prefix is 16777216 Possible devices, This means that manufacturer can use this prefix to produce this amount of devices,but it didn't mean that he already manufactured them all or he had a plan to do.
And if This Manufacturer used all possible devices for this prefix he had to buy a new prefix from the IEEE to manufacture extra devices.

IEEE Database:MA-L

North America/United States of America


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Founded in 1984, Twinhead started with manufacturing of personal computers and peripherals. Since 1990s, Twinhead gradually built up its name as a leading provider of mobile computers. In recent year, in view of the increasing commoditization of PC industry, Twinhead has turned its business focus to industrial and application specific/mission critical systems. Backed by advanced technology and vast experience accumulated over two-decade, Twinhead has rolled out products and established working relationship with major suppliers of many different industries. Twinhead continues to invest heavily into research and development to strengthen core capability of design/manufacturing industrial solutions for companies around the globe.
Today, Twinhead offers a wide range of product lines that meet diverse demands of customers from different industries. Our product offerings include mobile computers for military/industrial application, rugged tablet PCs, semi-rugged mobile computers, mobile thin clients, medical tablet PCs, and other customized mother boards/systems. In addition to standard product lines, Twinhead also offers full ODM and partial customization service to our customers. With our application-oriented design and flexible production model, Twinhead is now serving many partners who are leaders of their perspective industries.

Twinhead’s internal design process focuses heavily on understanding the operation of customer’s industry. Based on that insight, we propose unique concepts and develop tailored product solutions in a rapid pace to react to a fast changing climate. At the same time, as an ISO-9001 certified company, Twinhead holds all its procedures to the highest standard to ensure result are always steady and reliable. Combining with our supply chain management which is built to handle volatile demand and long lifecycle requirement of IPC market, Twinhead is equipped to offer both service and products to meet customer’s requirements. It is our pledge to stay true to “Best Quality and Customers First”.
Looking forward, Twinhead will continue to pursue the proven strategy of complete services, diversified products and flexible production. Twinhead will continue to offer different solution to meet different needs. With our devotion to develop more unique solutions for the application in special fields, strengthen our core capability, and create deeper penetration into vertical markets, Twinhead aims to become the leading of IPC system provider and your best partner for all your industrial computing needs.