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.
If you are trying to call someone who has blocked you, dialing *67 before their number will not bypass a landline block . Landline block lists match the incoming number exactly, even if you hide your caller ID. The only way to reach them is to be removed from their block list. how to unblock a number on a landline
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. Many modern cordless phones (like Panasonic or AT&T DECT 6
If you have followed the steps above but the number is still not getting through, try these troubleshooting tips: The only way to reach them is to