- Prefix
- 1C:21:D1 1C-21-D1 1C21.D1
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 1C:21:D1:00:00:00 – 1C:21:D1:FF:FF:FF
- Organization
- IEEE Registration Authority
- Registered address
- 445 Hoes Lane, Piscataway NJ 08554, US
- Country
- United States (US)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 1C:21:D1:00:00:00
IEEE Registration Authority holds 337 blocks in total: see all. Source: IEEE Registration Authority public listing.