MAC prefix 20:DF:3F
Nanjing SAC Power Grid Automation Co., Ltd.
| Vendor | Nanjing SAC Power Grid Automation Co., Ltd. |
|---|---|
| Short name | NanjingSACPo |
| Prefix | 20:DF:3F/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 20:DF:3F:00:00:00 – 20:DF:3F:FF:FF:FF |
| Notations | 20:DF:3F:00:00:0020-DF-3F-00-00-0020df.3f00.000020DF3F000000 |
Frequently asked questions
Which vendor does MAC address 20:DF:3F belong to?
MAC addresses starting with 20:DF:3F are assigned to Nanjing SAC Power Grid Automation Co., Ltd. according to the IEEE registry (prefix length 24 bits).
How many addresses does block 20:DF:3F contain?
The block contains 16,777,216 addresses from 20:DF:3F:00:00:00 to 20:DF:3F:FF:FF:FF.
Is 20:DF:3F a unicast or multicast address?
The least significant bit of the first byte is 0 – it is a unicast address. The U/L bit is 0, so the address is globally unique (universally administered).
How do I find the MAC address of my device?
On Linux use ip link, on Windows getmac /v or ipconfig /all, on macOS ifconfig. Note: phones and recent operating systems often use random, locally administered addresses on Wi-Fi.
Which other MAC prefixes does Nanjing SAC Power Grid Automation Co., Ltd. have?
Nanjing SAC Power Grid Automation Co., Ltd. holds 3 registered prefixes in total – the full list is on the vendor page.