MAC prefix A0:9C:19
| Vendor | Cig Shanghai Co Ltd |
|---|---|
| Short name | CigShanghai |
| Prefix | A0:9C:19/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | A0:9C:19:00:00:00 – A0:9C:19:FF:FF:FF |
| Notations | A0:9C:19:00:00:00A0-9C-19-00-00-00a09c.1900.0000A09C19000000 |
Frequently asked questions
Which vendor does MAC address A0:9C:19 belong to?
MAC addresses starting with A0:9C:19 are assigned to Cig Shanghai Co Ltd according to the IEEE registry (prefix length 24 bits).
How many addresses does block A0:9C:19 contain?
The block contains 16,777,216 addresses from A0:9C:19:00:00:00 to A0:9C:19:FF:FF:FF.
Is A0:9C:19 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 Cig Shanghai Co Ltd have?
Cig Shanghai Co Ltd holds 25 registered prefixes in total – the full list is on the vendor page.