Former IBM MAC address blocks

The IEEE registry once carried 5 blocks registered to IBM. All 5 blocks are now registered to IBM Corp. IBM Corp took over all of them.

Prefix	Block	Addresses	First registered	Organization
00:14:5E	MA-L	16.8 million	14 Apr 2005	IBM Corp
00:21:5E	MA-L	16.8 million	18 Jun 2008	IBM Corp
00:50:76	MA-L	16.8 million	8 Sep 2000	IBM Corp
5C:F3:FC	MA-L	16.8 million	7 Oct 2010	IBM Corp
E4:1F:13	MA-L	16.8 million	12 Aug 2009	IBM Corp

Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.