MAC prefix DC:21:B9
| Vendor | Sentec Co.Ltd |
|---|---|
| Short name | Sentec |
| Prefix | DC:21:B9/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | DC:21:B9:00:00:00 – DC:21:B9:FF:FF:FF |
| Notations | DC:21:B9:00:00:00DC-21-B9-00-00-00dc21.b900.0000DC21B9000000 |
Frequently asked questions
Which vendor does MAC address DC:21:B9 belong to?
MAC addresses starting with DC:21:B9 are assigned to Sentec Co.Ltd according to the IEEE registry (prefix length 24 bits).
How many addresses does block DC:21:B9 contain?
The block contains 16,777,216 addresses from DC:21:B9:00:00:00 to DC:21:B9:FF:FF:FF.
Is DC:21:B9 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 Sentec Co.Ltd have?
Sentec Co.Ltd holds 3 registered prefixes in total – the full list is on the vendor page.