CA:12:5C:00:00:00 to CA:12:5C:FF:FF:FF
Microsoft Corporation
Inspect this prefixRegistered address
One Microsoft Way
Redmond 98052-6399
Block details
- Registry
- CID, Company ID (CID)
- Prefix
- CA:12:5C /24
- Addresses in block
- 16,777,216
- Decimal range
- 222,180,201,725,952 to 222,180,218,503,167
- 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 CA:12:5C:00:00:00 and CA:12:5C: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.