PREFIX

1.    Class A -> WAN(Wide Area Network)

->1-131

Contoh: 1.1.1.130.1.1.1

2.   Class B -> MAN(Metropolitan Area Network)

->131-191

Contoh: 182.5.6.252

3.   Class C -> LAN(Local Area Network)

->192-254

Contoh: 192.168.2.1