18:A5:9C:4 IT-1
Every MAC address from 18:A5:9C:40:00:00 to 18:A5:9C:4F:FF:FF belongs to a block the IEEE assigned to IT-1. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 18:A5:9C:4 belongs to
Written 18:A5:9C:4, 18-A5-9C-4 or 18A59C4, depending on the system. Look up a full address.
Prefix
18:A5:9C:4/28
Organization
IT-1
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
18:A5:9C:40:00:00
Last address
18:A5:9C:4F:FF:FF
Address type
Globally unique, unicast
Registered address
260, Changnyong-daero Yeongtong-gu, Suwon-si Gyeonggi-do KR 16229
Parent block
Inside 18:A5:9C
This MA-M block is carved from the 24-bit block 18:A5:9C, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.