This article lists the reserved IP addresses Bablic uses. It is useful if wish to white list communication from Bablic SEO services to your server.
Incoming Communication
35.185.7.72 - This IP address is where you should set your domains if you wish to setup SmartProxy on a domain using A record. This is equivalent to using CNAME record to SEO.BABLIC.COM
Outgoing Communication
Other servers that might try to connect to your server:
104.196.33.33
35.227.82.163
104.155.44.230
104.155.78.181
35.240.53.152
34.77.184.137
104.155.21.56
35.187.174.83
35.205.21.215
35.205.199.189