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Devices with MAC addresses that start with 00-21-40 were manufactured by EN Technologies Inc.

Device ManufacturerEN Technologies Inc.
Geumbok Bldg. 9F, Band-yi-dong 45-2, Songpa-gu
Seoul 138-828
Estimated Devices with 00-21-4016256250
Estimated Total Devices From Mfg16256250
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