Proxy Range for http://www.myendnoteweb.com , https://www.myendnoteweb.com and http://www.isiknowledge.com/

Good day!

We are using proxy without identfication.  Could you please advise what is the range of IP address/es we need to white-list?  We noticed that the IP address constantly changes when accessing

www.myendnoteweb.com

Thank you so much.