18:C3:E4:3 Proximus sp. z .o.o.
Every MAC address from 18:C3:E4:30:00:00 to 18:C3:E4:3F:FF:FF belongs to a block the IEEE assigned to Proximus sp. z .o.o.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 18:C3:E4:3 belongs to
Written 18:C3:E4:3, 18-C3-E4-3 or 18C3E43, depending on the system. Look up a full address.
Prefix
18:C3:E4:3/28
Organization
Proximus sp. z .o.o.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
18:C3:E4:30:00:00
Last address
18:C3:E4:3F:FF:FF
Address type
Globally unique, unicast
Registered address
ul. Piatkowska 163 Poznan PL 60-650
Parent block
Inside 18:C3:E4
This MA-M block is carved from the 24-bit block 18:C3:E4, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.