MAC prefix B4:DE:31
| Vendor | Cisco Systems, Inc |
|---|---|
| Short name | Cisco |
| Prefix | B4:DE:31/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | B4:DE:31:00:00:00 – B4:DE:31:FF:FF:FF |
| Notations | B4:DE:31:00:00:00B4-DE-31-00-00-00b4de.3100.0000B4DE31000000 |
Frequently asked questions
Which vendor does MAC address B4:DE:31 belong to?
MAC addresses starting with B4:DE:31 are assigned to Cisco Systems, Inc according to the IEEE registry (prefix length 24 bits).
How many addresses does block B4:DE:31 contain?
The block contains 16,777,216 addresses from B4:DE:31:00:00:00 to B4:DE:31:FF:FF:FF.
Is B4:DE:31 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 Cisco Systems, Inc have?
Cisco Systems, Inc holds 1,258 registered prefixes in total – the full list is on the vendor page.