Phone number list management

A system, comprising:

• one or more processors;
• and
• memory including a plurality of computer-executable components that are executable by the one or more processors to perform a plurality of actions, the plurality of acts comprising:
• receiving telephone call data that reflects characteristics of telephone calls placed and received by a first user;
• based on the telephone call data, generating a first telephone number whitelist for the first user;
• accessing a second telephone number whitelist for a second user;
• determining a quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist;
• comparing the quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist to a threshold quantity;
• based on comparing the quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist to the threshold quantity, determining whether to combine the first telephone number whitelist and the second telephone number whitelist for the second user;
• and
• storing the first telephone number whitelist or the combined telephone number whitelist in association with the first user.

One or more non-transitory computer-readable media storing computer-executable instructions that upon execution cause one or more computers to perform acts comprising:

• receiving telephone call data that reflects characteristics of telephone calls placed and received by a first user;
• based on the telephone call data, generating a first telephone number whitelist for the first user;
• accessing a second telephone number whitelist for a second user;
• determining a quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist;
• comparing the quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist to a threshold quantity;
• based on comparing the quantity of telephone numbers that are included in both the first telephone number whitelist and the second telephone number whitelist to the threshold quantity, determining whether to combine the first telephone number whitelist and the second telephone number whitelist for the second user;
• and
• storing the first telephone number whitelist or the combined telephone number whitelist in association with the first user.