1C:21:D1:30:00:00 to 1C:21:D1:3F:FF:FF
Microview Science and Technology Co.,Ltd
Inspect this prefixRegistered address
NO.29 Zhufang Road,Shangdi,Haidian District,Beijing,P.R.China
Beijing Beijing 100085
Block details
- Registry
- MA-M, MAC Address Block Medium (OUI-28)
- Prefix
- 1C:21:D1:3 /28
- Addresses in block
- 1,048,576
- Decimal range
- 30,931,569,082,368 to 30,931,570,130,943
- 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 1C:21:D1:30:00:00 and 1C:21:D1:3F: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.