Communication using communication tokens, such as QR codes

A VoIP communication service using communication tokens, such as QR codes, to identify the receivers can provide callers with the ability to communicate with the receivers using VoIP technology, without the need to pre-registering with the VoIP service provider that hosts the communication. The tokens can be customized by having a profile, which can include conditions imposed by the receivers on the callers. The tokens can be used in a call center to provide VoIP communication services.