MAC prefix 40:D8:55:03:9
| Vendor | CI Systems Ltd |
|---|---|
| Short name | CI |
| Prefix | 40:D8:55:03:9/36 |
| Block type | MA-S (/36, 4,096 addresses) |
| Address range | 40:D8:55:03:90:00 – 40:D8:55:03:9F:FF |
| Notations | 40:D8:55:03:90:0040-D8-55-03-90-0040d8.5503.900040D855039000 |
Frequently asked questions
Which vendor does MAC address 40:D8:55:03:9 belong to?
MAC addresses starting with 40:D8:55:03:9 are assigned to CI Systems Ltd according to the IEEE registry (prefix length 36 bits).
How many addresses does block 40:D8:55:03:9 contain?
The block contains 4,096 addresses from 40:D8:55:03:90:00 to 40:D8:55:03:9F:FF.
Is 40:D8:55:03:9 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 CI Systems Ltd have?
CI Systems Ltd holds 2 registered prefixes in total – the full list is on the vendor page.
Nearby entries
- 40:D8:55:03:3 ErmesElettro
- 40:D8:55:03:4 DacomWest
- 40:D8:55:03:5 MesotechInte
- 40:D8:55:03:6 Schweersinfo
- 40:D8:55:03:7 SoftwareWork
- 40:D8:55:03:8 SpecialMeasu
- 40:D8:55:03:A Socusnetwork
- 40:D8:55:03:B Telcomkorea
- 40:D8:55:03:C ComputerSyst
- 40:D8:55:03:D TekelekEurop
- 40:D8:55:03:E VishayCeltro
- 40:D8:55:03:F UniSVRGlobal