System and user interface having push-to-talk, outbound dialer, and messaging functions with recipients identified using a proxy alias

An enterprise communication computing device enabling communication with recipient computing devices based upon unique, non-telephonic-based recipient computing device identifiers associated with recipient computing devices may be provided. The communication device may include a processor and a memory device and a communication interface. The communication interface may include a plurality of modules including telephonic communication, text-based messaging, and two-way radio communication. The processor may be programmed to generate a user interface with a plurality of icons, each representative of a module. The processor may receive a selection of a first icon representative of a first module, and may execute the first module. The processor may receive user input defining a message, including user identifiers identifying intended recipients, transmit, to a remote data source, a query including the identifiers, and receive recipient computing device identifiers including unique non-telephonic-based identifiers. The processor may transmit the message to each recipient computing device based upon the identifiers.