Section: 19.11 Dedicated Core Networks Identifier
Content: A Dedicated Core Network ID (DCN-ID) identifies a Dedicated Core Network (DCN) within a PLMN. The allowed values of DCN-ID shall be in the range of 0 to 65535. Values in the range of 0 to 127 are standardized and defined as follows: 0: Spare, for future use … 127: Spare, for future use Values in the range of 128 to 65535 are operator-specific. The use of the standardized DCN-ID is specified in 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [72].