Many modern cordless phones (like Panasonic or AT&T DECT 6.0) have built-in "Smart Call Blockers" that store numbers locally on the device.
Landline phones may seem like “old technology” in the age of smartphones, but they remain essential in many homes and offices. One common frustration is accidentally blocking a number—or wanting to reverse a block after resolving a dispute. Unblocking a number on a landline is not as uniform as on a cell phone, but it is still straightforward once you know which system you are using. how to unblock a number on a landline
