1. A server of a first domain in a telecommunications network adapted to manage DNS queries relating to said first domain, said server being configured to receive from a client device a DNS query seeking to obtain DNS data of the first domain, wherein said server comprises: a zone file containing a partitioning rule defining a partitioning of a set of subdomains of said first domain into subzones, the DNS data of each of said subzones being hosted by a corresponding partition server of a plurality of partition servers, wherein the partition servers belong to said first domain so that said partition servers and said server which receives a DNS query from a client device are at the same level in the domain hierarchy; and a processor configured to obtain, from said zone file, information to identify the corresponding partition server to respond to said DNS query based on the partitioning rule; wherein said server is configured to send said information to the client device in response to said DNS query.