Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for facilitating and improving push messaging provided to users. In one aspect, a method includes receiving, from a user device, a request to subscribe to a push messaging service of a particular subscription list, selecting a given number from a list of numbers for the particular subscription list, wherein the given number differs from a number of the user device, transmitting, to the user device and in response to receiving the request, a first message that presents a visual indication of the given number, receiving a notification transmitted, by the user device, to the given number, with the notification specifying that the user device communicated a confirmation to receive messages from the particular subscription list, and including contextual information corresponding to the user device or the user, selecting an additional message that presents additional visual information at the user device based, at least in part, on the contextual information and in response to receipt of the notification transmitted to the given number by the user device, and transmitting the additional message to the user device.
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