Ciao Antonia, If you are specifically looking for the Italian market try itnog. Itnog.it This has been discussed a couple of times on our telegram group and more lengthy questions can go on the mailing list. Both English and Italian are accepted. Some providers here in Italy offer protection as a paid service , others include it and all are required to block the agcom,CNCPO etc requests. Brian From: NANOG <nanog-bounces+b.turnbow=twt.it@nanog.org> On Behalf Of Antonia Affinito Sent: Wednesday, April 20, 2022 11:07 AM To: nanog@nanog.org Subject: NXDOMAIN Resolvers Good morning, I am currently analysing the DNS resolvers (local and public ones) in terms of protection and performance (in particular their speed). I noticed that, in case of a malicious domain name, some local resolvers send an NXDOMAIN and others a courtesy page address. Do you know if the resolvers (for example TIM, Wind or Fastweb) can return an NXDomain in order to protect their clients? Thanks a lot [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Mail priva di virus. www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>