- Prefix
- 00:21:57 00-21-57 0021.57
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 00:21:57:00:00:00 – 00:21:57:FF:FF:FF
- Organization
- National Datacast, Inc.
- Registered address
- 2100 Crystal Drive, Suite 750, Arlington VA 22202, US
- Country
- United States (US)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 00:21:57:00:00:00
National Datacast, Inc. holds 1 block in total: see all. Source: IEEE Registration Authority public listing.