20:DF:3F:00:00:00 to 20:DF:3F:FF:FF:FF
Nanjing SAC Power Grid Automation Co., Ltd.
Inspect this prefixRegistered address
No.11 Phoenix Road
Nanjing Jiangsu 211106
Block details
- Registry
- MA-L, MAC Address Block Large (OUI)
- Prefix
- 20:DF:3F /24
- Addresses in block
- 16,777,216
- Decimal range
- 36,143,206,760,448 to 36,143,223,537,663
- Address type
- Unicast, universally administered
What this block covers
The classic 24 bit OUI. The registrant owns the first three octets and can assign every one of the remaining 16.7 million addresses.
Any MAC address between 20:DF:3F:00:00:00 and 20:DF:3F: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.