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Phone companies sometimes block calls connected to suspicious calling patterns proactively for their customers. Many phone companies also enable their customers to block additional unwanted calls by enrolling in a service or installing an app. Consumers can also adjust certain settings on their phones, sign up with a third-party service, or download a third-party app to block suspected unwanted calls. A number of companies also offer call labeling to help consumers determine which calls they want to answer. Labeling services display categories for potentially unwanted or illegal calls such as "spam" or "scam likely" on the caller ID display. here is one of those links https://www.freecallerregistry.com/fcr/#