4C:81:BE:D0:00:00 to 4C:81:BE:DF:FF:FF
BEIJING CUNYIN CHENGQI TECHNOLOGY CO., LTD.
Inspect this prefixRegistered address
1201-02,12th Floor,Building 1,No.13,Linyin North Street,Pinggu District
Beijing 101200
Block details
- Registry
- MA-M, MAC Address Block Medium (OUI-28)
- Prefix
- 4C:81:BE:D /28
- Addresses in block
- 1,048,576
- Decimal range
- 84,120,135,794,688 to 84,120,136,843,263
- 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 4C:81:BE:D0:00:00 and 4C:81:BE:DF: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.