MAC prefix 00:04:21
Ocular Networks
| Vendor | Ocular Networks |
|---|---|
| Short name | OcularNetwor |
| Prefix | 00:04:21/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 00:04:21:00:00:00 – 00:04:21:FF:FF:FF |
| Notations | 00:04:21:00:00:0000-04-21-00-00-000004.2100.0000000421000000 |
Frequently asked questions
Which vendor does MAC address 00:04:21 belong to?
MAC addresses starting with 00:04:21 are assigned to Ocular Networks according to the IEEE registry (prefix length 24 bits).
How many addresses does block 00:04:21 contain?
The block contains 16,777,216 addresses from 00:04:21:00:00:00 to 00:04:21:FF:FF:FF.
Is 00:04:21 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.