A device may receive a request to update a data structure with first communication information from multiple applications. The first communication information may identify communications made, by a particular user, using the applications, and the applications may be associated with different modes of communication. The device may request the first communication information from devices storing the first communication information, may receive the first communication information, and may store the first communication information in the data structure. The device may receive criteria identifying requested communications, and may search the data structure to determine second communication information. The second communication information may identify the requested communications that satisfy the criteria. The device may provide the second communication information to a user device associated with the particular user.