NationalData

National Datacomm Corporation — 3 OUI prefix(es)

3 OUI prefix(es)

OUI Prefix	MAC Range
00:80:C6	00:80:C6:00:00:00 ~ 00:80:C6:FF:FF:FF
00:21:57	00:21:57:00:00:00 ~ 00:21:57:FF:FF:FF
00:05:89	00:05:89:00:00:00 ~ 00:05:89:FF:FF:FF

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