online CIDR and IP subnet calculator : Check host

100.27.240.0-100.27.255.255
100.27.240.0/20

100.28.0.0-100.28.63.255
100.28.0.0/18

100.28.64.0-100.28.95.255
100.28.64.0/19

100.28.96.0-100.28.111.255
100.28.96.0/20

100.28.112.0-100.28.119.255
100.28.112.0/21

100.28.120.0-100.28.123.255
100.28.120.0/22

100.28.124.0-100.28.125.255
100.28.124.0/23

IP subnet calculator 100.27.240.0-100.28.125.255