Disable Skype ads: 1.) Add hosts to your hosts file 2.) Flush DNS resolver cache (ipconfig /flushdns)

hosts

# Block Skype ads
127.0.0.1 *.msads.net
127.0.0.1 *.msecn.net
127.0.0.1 *.rad.msn.com
127.0.0.1 a.ads2.msads.net
127.0.0.1 ac3.msn.com
127.0.0.1 ad.doubleclick.net
127.0.0.1 adnexus.net
127.0.0.1 adnxs.com
127.0.0.1 ads1.msn.com
127.0.0.1 ads2.msads.net
127.0.0.1 aka-cdn-ns.adtech.de
# Keep "apps.skype.com" if you want to see Skype Home (prepend # at line below)!
127.0.0.1 apps.skype.com
127.0.0.1 b.ads2.msads.net
127.0.0.1 bs.serving-sys.com
127.0.0.1 cdn.atdmt.com
127.0.0.1 cds26.ams9.msecn.net
127.0.0.1 db3aqu.atdmt.com
127.0.0.1 ec.atdmt.com
127.0.0.1 flex.msn.com
127.0.0.1 g.msn.com
127.0.0.1 live.rads.msn.com
127.0.0.1 msntest.serving-sys.com
127.0.0.1 rad.msn.com
127.0.0.1 sO.2mdn.net
127.0.0.1 secure.flashtalking.com
127.0.0.1 static.2mdn.net
127.0.0.1 static.2mdn.net

# PRO-TIP: Removing the adds does NOT remove the add placeholder side bar(s)! 
# This can be removed by going to: %appdata%/skype/YOUR_USER_NAME/config.xml 
# and set all Advert-related values to 0:
#
#    <AdvertEastRailsEnabled>0</AdvertEastRailsEnabled>
#    <AdvertLargeEastRailCutoff>0</AdvertLargeEastRailCutoff>
#    <AdvertNorthRailCutoff>0</AdvertNorthRailCutoff>
#    <AdvertPlaceholder>0</AdvertPlaceholder>
#    <AdvertSmallEastRailCutoff>0</AdvertSmallEastRailCutoff>

I've add some urls in my fork: https://gist.github.com/joielechong/d0042338fd3132013aec4ee56045e558

👍 for "apps.skype.com"

using only 127.0.0.1 apps.skype.com is enough to blocks all ads (but deactivate the skype home panel as well as a benign side-effect)

Hi!
Recently my Skype has stopped working after I've used hosts file to block ads. The problem is that my hosts file is custom: it includes many sources... So it's hard to find which one made Skype unusable. Any ideas where to find hosts I should whitelist to unblock Skype?