- Prefix
- 00:21:5A 00-21-5A 0021.5A
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 00:21:5A:00:00:00 – 00:21:5A:FF:FF:FF
- Organization
- Hewlett Packard
- Registered address
- 20555 State Highway 249, Houston TX 77070, US
- Country
- United States (US)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 00:21:5A:00:00:00
Hewlett Packard holds 150 blocks in total: see all. Source: IEEE Registration Authority public listing.