5A:18:FF:00:00:00 to 5A:18:FF:FF:FF:FF
FiRa Consortium
Inspect this prefixRegistered address
3855 SW 153RD Drive
Beaverton OR 97003
Block details
- Registry
- CID, Company ID (CID)
- Prefix
- 5A:18:FF /24
- Addresses in block
- 16,777,216
- Decimal range
- 99,063,403,905,024 to 99,063,420,682,239
- 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 5A:18:FF:00:00:00 and 5A:18:FF: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.