hpHosts network issue

An issue has been identified that's causing extreme slow connections to the hpHosts network, affecting;hosts-file.netforum.hosts-file.netverify.hosts-file.net*.mysteryfcm.co.ukfspamlist.comforum.abelhadigital.comAmongst others. I've ruled out the majority of the internal hardware, and suspect an external issue (will be speaking to the ISP once I've ruled out the rest of the hardware).Apologies