MAC prefix 9C:30:66
RWE Effizienz GmbH
| Vendor | RWE Effizienz GmbH |
|---|---|
| Short name | RWEEffizienz |
| Prefix | 9C:30:66/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 9C:30:66:00:00:00 – 9C:30:66:FF:FF:FF |
| Notations | 9C:30:66:00:00:009C-30-66-00-00-009c30.6600.00009C3066000000 |
Frequently asked questions
Which vendor does MAC address 9C:30:66 belong to?
MAC addresses starting with 9C:30:66 are assigned to RWE Effizienz GmbH according to the IEEE registry (prefix length 24 bits).
How many addresses does block 9C:30:66 contain?
The block contains 16,777,216 addresses from 9C:30:66:00:00:00 to 9C:30:66:FF:FF:FF.
Is 9C:30:66 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.