30:3D:51:40:00:00 to 30:3D:51:4F:FF:FF
Dspread Technology (Beijing) Inc.
Inspect this prefixRegistered address
Jingxin Building, 2045 Suite , Chaoyang District
Beijing 100027
Block details
- Registry
- MA-M, MAC Address Block Medium (OUI-28)
- Prefix
- 30:3D:51:4 /28
- Addresses in block
- 1,048,576
- Decimal range
- 53,039,914,287,104 to 53,039,915,335,679
- Address type
- Unicast, universally administered
What this block covers
A 28 bit block. Sixteen of these fit inside one 24 bit prefix, so the first three octets are shared with other registrants.
Any MAC address between 30:3D:51:40:00:00 and 30:3D:51:4F:FF:FF belongs to this assignment. The registrant chooses the remaining 20 bits, so the same prefix can appear on very different products from the same company.