Star codes ( *60 , *87 ) are standard for traditional copper-wire landlines and fiber-optic digital lines. However, if you have a VoIP (Voice over IP) landline (where your phone plugs into a router or internet modem), these codes may not work. In this case:
Most traditional landline providers (like AT&T, Verizon, CenturyLink) use a star code system to manage blocked lists. how to unblock a phone number on a landline
If the number isn't in your *60 list or your handset's block list, it might be blocked by a third-party device. Do you have a separate "Call Blocker" box plugged into your phone jack? If so, you will need to follow the instructions for that specific device (often involves pressing a red button or entering a PIN on the device itself). Star codes ( *60 , *87 ) are
Landline service providers use standardized star codes to manage calling features. The correct code depends on whether you want to unblock an incoming caller or allow your own number to be seen on someone else's caller ID. Managing Incoming Blocked Numbers via *60 If the number isn't in your *60 list