A system comprising: at least one device configured to: receive at least one query from a break in gateway control function BIGCF of an Internet protocol multimedia subsystem IMS, the at least one query being associated with a call, determine whether the call is to be served by an IMS core associated with providing IMS-related services, the IMS core including a serving call session control function S-CSCF, an interrogating call session control function I-CSCF, and a proxy call session control function P-CSCF; forward routing information, to the BIGCF of the IMS, based on the at least one query, the routing information indicating that processing associated with routing the call is to bypass the IMS core when the calling party does not invoke an IMS related service, the called party does not invoke an IMS related service, and the called party is not an IMS subscriber, and the routing information indicating that the call is to be routed through the IMS core when the calling party invokes an IMS related service, the called party invokes an IMS related service, or the called party is an IMS subscriber. at least one device configured to: receive at least one query from a break in gateway control function BIGCF of an Internet protocol multimedia subsystem IMS, the at least one query being associated with a call, determine whether the call is to be served by an IMS core associated with providing IMS-related services, the IMS core including a serving call session control function S-CSCF, an interrogating call session control function I-CSCF, and a proxy call session control function P-CSCF; forward routing information, to the BIGCF of the IMS, based on the at least one query, the routing information indicating that processing associated with routing the call is to bypass the IMS core when the calling party does not invoke an IMS related service, the called party does not invoke an IMS related service, and the called party is not an IMS subscriber, and the routing information indicating that the call is to be routed through the IMS core when the calling party invokes an IMS related service, the called party invokes an IMS related service, or the called party is an IMS subscriber. receive at least one query from a break in gateway control function BIGCF of an Internet protocol multimedia subsystem IMS, the at least one query being associated with a call, determine whether the call is to be served by an IMS core associated with providing IMS-related services, the IMS core including a serving call session control function S-CSCF, an interrogating call session control function I-CSCF, and a proxy call session control function P-CSCF; forward routing information, to the BIGCF of the IMS, based on the at least one query, the routing information indicating that processing associated with routing the call is to bypass the IMS core when the calling party does not invoke an IMS related service, the called party does not invoke an IMS related service, and the called party is not an IMS subscriber, and the routing information indicating that the call is to be routed through the IMS core when the calling party invokes an IMS related service, the called party invokes an IMS related service, or the called party is an IMS subscriber.