The following servers for Alexa top 1M names incorrectly return BADVERS to a DNS query with a EDNS option. BADVERS is supposed to be used for EDNS version negotiation not because you see a EDNS option. Please contact your nameserver vendor for a fix. This error will result in DNS validation failures if you are serving signed zones. This error will also result in slower DNS resolution. Mark a.myradns.at b.myradns.at ns1.careerhub.com.au ns2.careerhub.com.au ns3.careerhub.com.au lyra.caixa.gov.br mira.caixa.gov.br ns1.divio.ch ns2.divio.ch ns4.divio.ch ns2.ec.com.cn sns.ec.com.cn ns1.sina.com.cn mecca.dlnu.edu.cn ns2.brainydns.com ns1.commonmx.com ns2.commonmx.com ns1.derbycon.com ns2.derbycon.com ns3.derbycon.com ns4.derbycon.com ns1.dnsnuts.com ns2.dnsnuts.com ns1.dockyard.com ns3.dockyard.com ns2.domainmx.com ns1.energeticsource.com ns2.energeticsource.com dev2.hastydns.com ns1.hastydns.com ns2.hastydns.com ns.inboxinc.com ns3.inboxinc.com ns1.kirklanddc.com ns2.kirklanddc.com ns1.nawebu.com ns2.nawebu.com ns3.nawebu.com ns1.pebblecode.com ns2.pebblecode.com ns3.pebblecode.com ns1.pro-websolutions.com ns4.pro-websolutions.com ns1.redmonddc.com ns2.redmonddc.com ns1.rentondc.com ns2.rentondc.com ns1.smtmdns.com ns2.smtmdns.com ns1.torresdns.com ns2.torresdns.com ns1.usecanvas.com ns2.usecanvas.com ns4.weddingful.com ns1.worlize.com ns2.worlize.com a.myradns.de b.myradns.de ns3.zenjoy.eu ns1.tsp.gov ns2.tsp.gov ns1.360dns.net ns2.360dns.net uns1.bhn.net uns2.bhn.net ns1.bindhost.net ns2.bindhost.net itchy.earthlink.net scratchy.earthlink.net a.myradns.net b.myradns.net c.myradns.net resolver1.qwest.net resolver2.qwest.net sauthns1.qwest.net sauthns2.qwest.net ns1-asia.sprintlink.net ns1-auth.sprintlink.net ns2-asia.sprintlink.net ns2-auth.sprintlink.net ns3-asia.sprintlink.net dns4.websolvers.net ns2.panmedia.co.nz ns1.collegiateschool.org ns4.collegiateschool.org ns.min-financas.pt dns.ntu.edu.tw ntust.edu.tw dns.ntust.edu.tw ns2.grade.us -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org