The present disclosure is directed to allocating communication resources via information technology infrastructure. A system can provide a communication tag and an analytics tag for integration in a web site. The system can receive a request to allocate a phone number generated based on an interaction between the communication tag and the analytics tag. The request can include the communication endpoint identifier, the site identifier for the web site, and a bucket identifier formed from bucketing criteria corresponding to a network activity session of the computing device. The system can determine a virtual phone number to assign to a combination of the values of the fields provided in the request, and create a link between the assigned virtual number and the combination. The system can provide the assigned virtual phone number to the computing device that initiated the request.