For many traditional landlines, call blocking is managed by the telephone service provider rather than the phone handset itself. These services are controlled using "vertical service codes" (star codes).
Follow the automated voice prompts to access your blocked list. how do you unblock a phone number on a landline better
The process is similar. Log into your Vonage online account or use their Extensions mobile app . In the app, go to your recent calls, find the number you want to unblock, and swipe left to reveal an "Unblock" option. In your online account, you'll find a straightforward list of blocked numbers with an "X" next to each one for removal. For many traditional landlines, call blocking is managed
If you cannot remove the block yourself, call your service provider and ask them to remove the number from your account’s block list. The process is similar
Note: If you want to disable the block feature entirely and unblock every single number simultaneously, dial after calling into the *60 system. Managing Anonymous Call Rejection
If your landline runs through your internet provider (like Comcast Xfinity, Spectrum, or Vonage), you manage blocked numbers via an app or online dashboard.