Tag Archives: TCP/IP

CIDR Conversation Table

CIDR Conversion Table

CIDR LengthMask# of Networks#  of Hosts
/1128.0.0.0128 A2,147,483,392
/2192.0.0.064 A1,073,741,696
/3224.0.0.032 A536,870,848
/4240.0.0.016 A268,435,424
/5248.0.0.08 A134,217,712
/6252.0.0.04 A67,108,856
/7254.0.0.02 A33,554,428
/8255.0.0.01 A16,777,214
/9255.128.0.0128 B8,388,352
/10255.192.0.064 B4,194,176
/11255.224.0.032 B2,097,088
/12255.240.0.016 B1,048,544
/13255.248.0.08 B524,272
/14255.252.0.04 B262,136
/15255.254.0.02 B131,068
/16255.255.0.01 B65,024
/17255.255.128.0128 C32,512
/18255.255.192.064 C16,256
/19255.255.224.032 C8,128
/20255.255.240.016 C4,064
/21255.255.248.08 C2,032
/22255.255.252.04 C1,016
/23255.255.254.02 C508
/24255.255.255.01 C254
/25255.255.255.1282 subnets124
/26255.255.255.1924 subnets62
/27255.255.255.2248 subnets30
/28255.255.255.24016 subnets14
/29255.255.255.24832 subnets6
/30255.255.255.25264 subnets2
/31255.255.255.254nonenone
/32255.255.255.255none1