Definition of manufacturer by MAC address

for example: d4:3d:7e:9e:10:18, 00-18-0a-72-bd-a0, 000e.edce.ff2b, d404ff5dedf0, 186472

MAC-address (in abbreviated form Media Access Control, also Hardware Address) of a device is a unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. In this context, MAC addresses are used in the medium access control protocol sublayer.