A method includes receiving, at a first distributed mobile architecture (DMA) system, a call from a first mobile subscriber to a second mobile subscriber and determining whether the second mobile subscriber is registered with one of the first DMA system and a second DMA system based on information stored at an authentication, authorization, and accounting module. The information stored at the AAA module includes a first home location register storing information associated with mobile subscribers registered with the first DMA system and a first community location register storing information associated with a second HLR of the second DMA system.