18.104.22.168 belongs to...
Hosting Services, Utah
22.214.171.124 - 126.96.36.199
ch15.lon.monitorengine.com is 188.8.131.52, which belongs to...
Linode Virtual Cloud Servers
184.108.40.206 - 220.127.116.11
forever.alone.net is 18.104.22.168, which belongs to...
Internap.com Hosting & Datacenters, Georgia
22.214.171.124 - 126.96.36.199
BTW - Hosting Services, Linode and Internap all have other ranges. These have been listed here in WW forums and can be found using the Search.
And just a FYI, referrers can (and often are) easily be spoofed.