To get the range you want you'd need to calculate the CIDR.
There are some good online tools for doing this.
If you go to:
Input 184.108.40.206 as the IP address then select 14 as maximum address (lowest number that will accomodate the 10 you want) it will show you:
NETMASK should be 255.255.255.240.
First IP is actually 220.127.116.11 and last IP is 18.104.22.168. This encompasses the range you specified (22.214.171.124 - 126.96.36.199). It also gives you the CIDR (/28).