How do I update my DNS on Cloudflare?

process the process for setting up account level custom nameservers depends on whether cloudflare is managing your domain’s dns if cloudflare manages your domain’s dns create an account level nameserver with a https //api cloudflare com/#account level custom nameservers add account custom nameserver cloudflare creates the https //www ietf org/rfc/rfc1912 txt automatically to enable the custom nameservers on existing zones use a https //api cloudflare com/#account level custom nameservers usage for a zone set account custom nameserver related zone metadata on each zone modify the zone’s registrar to use the custom nameserver names to enable the custom nameserver by default for all new zones, use a https //api cloudflare com/#accounts update account setting the value of use account custom ns by default to true if another provider manages your domain’s dns create an account level nameserver with a https //api cloudflare com/#account level custom nameservers add account custom nameserver add the glue records for each entry at your dns provider use a https //api cloudflare com/#account level custom nameservers verify account custom nameserver glue records to verify that the glue records are active to enable the custom nameservers on existing zones use a https //api cloudflare com/#account level custom nameservers usage for a zone set account custom nameserver related zone metadata on each zone modify the zone’s registrar to use the custom nameserver names to enable the custom nameserver by default for all new zones, use a https //api cloudflare com/#accounts update account setting the value of use account custom ns by default to true configure zone level custom nameservers to add custom nameservers to a specific zone log into the cloudflare dashboard ensure the website you want to update is selected click the dns app on custom nameservers, click add custom nameservers and enter nameserver hostnames (e g ns1, ns2, ns3) cloudflare will assign ipv4 and ipv6 to your nameservers the next steps depends on whether cloudflare manages the dns for your domain if cloudflare does manage the dns for your domain, no further action is required if cloudflare does not manage the dns for your domain, add the custom nameservers and ip addresses to your domain registrar’s dns as glue ( a or aaaa ) records if you do not add these records, dns lookups for your domain will fail