MAC prefix CC:19:66

EM Microelectronic

VendorEM Microelectronic
Short nameEMMicroelect
PrefixCC:19:66/24
Block typeMA-L (/24, 16,777,216 addresses)
Address rangeCC:19:66:00:00:00 – CC:19:66:FF:FF:FF
NotationsCC:19:66:00:00:00
CC-19-66-00-00-00
cc19.6600.0000
CC1966000000

Frequently asked questions

Which vendor does MAC address CC:19:66 belong to?

MAC addresses starting with CC:19:66 are assigned to EM Microelectronic according to the IEEE registry (prefix length 24 bits).

How many addresses does block CC:19:66 contain?

The block contains 16,777,216 addresses from CC:19:66:00:00:00 to CC:19:66:FF:FF:FF.

Is CC:19:66 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.

Which other MAC prefixes does EM Microelectronic have?

EM Microelectronic holds 76 registered prefixes in total – the full list is on the vendor page.

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