3A:F5:21:00:00:00 to 3A:F5:21:FF:FF:FF
Single Digits
Inspect this prefixRegistered address
4 Bedford Farms Drive, Suite 210
Bedford NH 03110
Block details
- Registry
- CID, Company ID (CID)
- Prefix
- 3A:F5:21 /24
- Addresses in block
- 16,777,216
- Decimal range
- 64,824,495,046,656 to 64,824,511,823,871
- Address type
- Unicast, locally administered
What this block covers
A 24 bit identifier that looks like an OUI but is explicitly not for globally unique addresses. The local bit is set, so CID addresses are locally administered by definition.
Any MAC address between 3A:F5:21:00:00:00 and 3A:F5:21:FF:FF:FF belongs to this assignment. The registrant chooses the remaining 24 bits, so the same prefix can appear on very different products from the same company.