- Prefix
- 00:21:5E 00-21-5E 0021.5E
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 00:21:5E:00:00:00 – 00:21:5E:FF:FF:FF
- Organization
- IBM Corp
- Registered address
- 3039 E Cornwallis Road, Research Triangle Park NC 27709-2195, US
- Country
- United States (US)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 00:21:5E:00:00:00
IBM Corp holds 28 blocks in total: see all. Source: IEEE Registration Authority public listing.