Section: 19.4.2.8 DNS subdomain for operator usage in EPC
Content: The EPC nodes DNS subdomain (DNS zone) shall be derived from the MNC and MCC by adding the label "node" to the beginning of the Home Network Realm/Domain (see clause 19.2) and shall be constructed as: node.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org This DNS subdomain is formally placed into the operator's control. 3GPP shall never take this DNS subdomain back or any zone cut/subdomain within it for any purpose. As a result the operator can safely provision any DNS records it chooses under this subdomain without concern about future 3GPP standards encroaching on the DNS names within this zone.