A custom hosts file will block most ads, spam, malware, blacklisted sites, and many other places on the internet you should never browse to.

Download the ‘hosts‘ file and in most Linux systems put the file in ‘/etc/hosts’.
For Windows put the file in ‘C:\Windows\System32\drivers\etc\hosts’.

Make the permissions ‘444’ or ‘Read Only’ to prevent the file from being changed for added security.

Download:  Hosts File

Modified Sept 19 2016
For more information about this list, see: http://forum.xda-developers.com/showthread.php?t=509997
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entries: 63846
last updated 2016-09-19 09:46
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sources:
BigTinCan.com Android Ad Blocking App
http://www.mvps.org/winhelp2002/hosts.txt
http://pgl.yoyo.org/adservers/serverlist.php?showintro=0;hostformat=hosts