MAC prefix C4:C1:9F
National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO)
| Vendor | National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO) |
|---|---|
| Short name | NationalOilw |
| Prefix | C4:C1:9F/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | C4:C1:9F:00:00:00 – C4:C1:9F:FF:FF:FF |
| Notations | C4:C1:9F:00:00:00C4-C1-9F-00-00-00c4c1.9f00.0000C4C19F000000 |
Frequently asked questions
Which vendor does MAC address C4:C1:9F belong to?
MAC addresses starting with C4:C1:9F are assigned to National Oilwell Varco Instrumentation, Monitoring, and Optimization (NOV IMO) according to the IEEE registry (prefix length 24 bits).
How many addresses does block C4:C1:9F contain?
The block contains 16,777,216 addresses from C4:C1:9F:00:00:00 to C4:C1:9F:FF:FF:FF.
Is C4:C1:9F 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.