liveadexchanger.com is an advertising network with a questionable reputation currently hosted on a Google IP of 220.127.116.11. The WHOIS details are anonymous, never a good sign for an ad network.
Seemingly running ads on the scummiest websites, liveadexchanger.com does things like trying to install fake Flash updates on visitors computers, as can be seen from this URLquery report... you might find the screenshot missing because of the complex URL, so here it is..
That landing page is on alwaysnewsoft.traffic-portal.net (part of an extraordinarily nasty network at 18.104.22.168/29) which then forwards unsuspecting visitors to a fake download at intva31.peripheraltest.info which you will not be surprised to learn is hosted at the adware-pusher's faviourite host of Amazon AWS.
Of the 567 sites that have been hosted in this /29 (not all are there now), 378 of them are tagged as malicious in some way by Google (67%) and 157 (28%) are also tagged by SURBL as being malicious in some way. Overall then, 74% are marked as malicious by either Google or SURBL, which typically means that they just haven't caught up yet with the other bad domains. The raw data can be seen here [pastebin].
At the time of writing, the following websites appear to be live:
The WHOIS details for this block:
%rwhois V-1.5:003eff:00 rwhois.singlehop.com (by Network Solutions, Inc. V-22.214.171.124)
network:Street-Address:Kralja Nikole 33
If you are using domain-based blocklists, this [pastebin] is the list of domains currently or formerly hosted on this block with the subdomains removed. Other than that, I would recommend the following blocklist: