Rete		NetMask		Data attivazione		Ultima Modifica
				>/32 (255.255.255.255) >/30 (255.255.255.252) >/29 (255.255.255.248) >/28 (255.255.255.240) >/27 (255.255.255.224) >/26 (255.255.255.192) >/25 (255.255.255.128) >/24 (255.255.255.0) >/23 (255.255.254.0) >/22 (255.255.252.0) >/21 (255.255.248.0) >/20 (255.255.240.0) >/19 (255.255.224.0) >/18 (255.255.192.0) >/17 (255.255.128.0) >/16 (255.255.0.0)