Processing unwanted calls

A system for processing inbound calls, wherein plural distinct marketing communications are respectively associated with plural marketing campaigns, and distinct pools of plural inbound phone addresses assigned to the system are respectively associated with the marketing campaigns, the system comprising:

• a telephony interface configured to be coupled to a Public Switched Telephone Network (PSTN), the telephony interface having associated therewith a plurality of phone addresses;
• a computing device communicatively coupled to the telephony interface;
• non-transitory media storing instructions readable by the computing device that when executed by the computing device cause the computing device to:
• detect reception of a phone call by the telephony interface directed to a one of the phone addresses associated with the telephony interface;
• obtain a phone address of the phone call;
• and
• if the phone address of the phone call is in a list of candidate spam phone addresses, identify the phone call as a spam call if the phone call further satisfies a predetermined heuristic having a vector of scores derived from the phone call;
• wherein the list of candidate spam phone addresses comprises phone addresses that were used to call one of the inbound phone addresses at a time when the one of the inbound phone addresses was not placed in one of the marketing campaigns.