If you are using callbacks, either as a client or as a partner, you can whitelist the Adjust server IPs and reject all other requests, in order to be sure that a callback is legitimate. All Adjust callbacks will be coming from the subnets `173.208.60.0/23`, `178.162.200.128/26`, `178.162.216.64/26`, `178.162.216.128/26`, `178.162.216.192/26`, `178.162.219.0/24`, `185.151.204.0/22`, `199.101.182.0/23` and `23.19.48.0/22`; these are subnets that include multiple IPs.  

You can [download a text file](https://adjust.my.salesforce.com/sfc/p/b0000000bMus/a/0X000000kMWS/j_lIuK2dVZLQyw4cVKNuaL2VN3lOQt_fizIetUhiXB4) of our full range of server IPs.  

**As of December 2018:** If you have a hostname with an AAAA record, we will send our callbacks from our IPv6 range. If you have a whitelist, you must also add the following subnet and full range (the list is not available in the text file or list below):  

Subnet: `2a0b:14c0::/32`  
Start range: `2a0b:14c0:0:0:0:0:0:0`  
End range: `2a0b:14c0:ffff:ffff:ffff:ffff:ffff:ffff`
