Yes. There are many apps that work for mobile phones. There are also some devices that block calls using a landline phone. However, they are not flexible. If yo

Yes. There are many apps that work for mobile phones. There are also some devices that block calls using a landline phone. However, they are not flexible. If you want to block phone numbers using a pattern, like *01 to *99, it is difficult to do it using those devices. That is why a Raspberry Pi would be a better fit. However, it seems to be more expensive.