40:D8:55:15:C0:00 to 40:D8:55:15:CF:FF
Spectratech Inc.
Inspect this prefixRegistered address
4-22-3-101 Kaminoge
Setagayaku Tokyo 158-0093
Block details
- Registry
- IAB, Individual Address Block (IAB)
- Prefix
- 40:D8:55:15:C /36
- Addresses in block
- 4,096
- Decimal range
- 71,297,884,602,368 to 71,297,884,606,463
- Address type
- Unicast, universally administered
What this block covers
The retired predecessor to MA-S, the same size and issued from a handful of IEEE owned prefixes. No new IABs have been issued since 2014, but existing ones remain valid.
Any MAC address between 40:D8:55:15:C0:00 and 40:D8:55:15:CF:FF belongs to this assignment. The registrant chooses the remaining 12 bits, so the same prefix can appear on very different products from the same company.