US Patent 11863704 Call limiting using burst detection

Described are techniques including a computer-implemented method of maintaining a list of newly assigned phone numbers. The method further comprises intermittently removing phone numbers from the list of newly assigned phone numbers. The method further comprises determining that a newly assigned phone number initiates a number of calls per unit time that exceeds a threshold number of calls per unit time. The method further comprises automatically flagging the newly assigned phone number as a possible robocaller.