Patent ID: 8600377

Claim:
A method for obtaining a roaming number of a callee, comprising: obtaining, by a user database device of a distributed Home Location Register HLR system, an identification number of a callee carried in a received Send Routing Information SRI request message, wherein the SRI request message is transmitted to the user database device via an HLR front end in a signaling area in which a caller exists; determining an HLR front end corresponding to the identification number according to corresponding relationship information in which the corresponding relationship between an identification number of a callee and an identification of an HLR front end on which a latest Mobile Application Part MAP process of the callee takes place is recorded, wherein the HLR front end on which the latest MAP process of the callee takes place is an HLR front end in a signaling area in which the callee currently exists; and sending, by the user database device, a Provide Roaming Number PRN request message of the callee via the determined HLR front end, and obtaining the roaming number of the callee from a returned PRN response message.