online CIDR and IP subnet calculator : Check host

66.232.99.16-66.232.99.31
66.232.99.16/28

66.232.99.32-66.232.99.63
66.232.99.32/27

66.232.99.64-66.232.99.127
66.232.99.64/26

66.232.99.128-66.232.99.255
66.232.99.128/25

66.232.100.0-66.232.100.127
66.232.100.0/25

66.232.100.128-66.232.100.159
66.232.100.128/27

66.232.100.160-66.232.100.167
66.232.100.160/29

IP subnet calculator 66.232.99.16-66.232.100.167