Systems and methods for suggesting contacts

An electronic communications system which is coupled to a mobile network, a wireless local-area network (WLAN), and a voice over IP (VoIP) service, the electronic communications system comprising:

• a communications device associated with a user account and a VoIP telephone number for making VoIP calls using the VoIP service, wherein the communications device has a contact tracking application and is coupled to the VoIP service and at least one of the mobile network and the WLAN;
• and
• a communications routing system coupled to the communications device, the communications routing system configured to:
• route, via a routing engine, communications events between the communications device and a plurality of further communications devices coupled to the communications routing system as VoIP calls using respective VoIP telephone numbers;
• store, for the user account, a contact database representing VoIP telephone numbers stored in the contact tracking application of the communications device associated with the user account;
• store, in the contact database for the user account, a log of communications events including a record for each new telephone number;
• and
• when the record for a new telephone number satisfies a threshold condition, provide a prompt, at the communications device, to add the new telephone number to the contact tracking application.