MAC prefix D4:F9:21
Qingdao Intelligent&Precise Electronics Co.,Ltd.
| Vendor | Qingdao Intelligent&Precise Electronics Co.,Ltd. |
|---|---|
| Short name | QingdaoIntel |
| Prefix | D4:F9:21/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | D4:F9:21:00:00:00 – D4:F9:21:FF:FF:FF |
| Notations | D4:F9:21:00:00:00D4-F9-21-00-00-00d4f9.2100.0000D4F921000000 |
Frequently asked questions
Which vendor does MAC address D4:F9:21 belong to?
MAC addresses starting with D4:F9:21 are assigned to Qingdao Intelligent&Precise Electronics Co.,Ltd. according to the IEEE registry (prefix length 24 bits).
How many addresses does block D4:F9:21 contain?
The block contains 16,777,216 addresses from D4:F9:21:00:00:00 to D4:F9:21:FF:FF:FF.
Is D4:F9:21 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 Qingdao Intelligent&Precise Electronics Co.,Ltd. have?
Qingdao Intelligent&Precise Electronics Co.,Ltd. holds 23 registered prefixes in total – the full list is on the vendor page.